media: atomisp: Remove remaining instance of call to trace_printk

(patch based on intel-aero kernel patch:
 https://github.com/intel-aero/meta-intel-aero-base/commit/26fc9fe5030b63bc9dcf0b5f32981948911ca272)

Here is the original commit message from the aforementioned patch:

	From 26fc9fe5030b63bc9dcf0b5f32981948911ca272 Mon Sep 17 00:00:00 2001
	From: Lucas De Marchi <lucas.demarchi@intel.com>
	Date: Fri, 7 Jul 2017 14:23:53 -0700
	Subject: [PATCH] linux-yocto: Remove remaining instance of call to
	 trace_printk

	It's not sufficient to leave trace_printk() out of "normal call chains" since
	the way trace infrastructure works is that it will allocate the trace_printk
	buffers if the symbol is there (by using a separate section for the function
	and checking if __start_* and __stop_* symbols are different.

	Therefore, even if the default value for the param tells the module to use
	printk(), just the fact that it can be changed to trace_printk() means the
	initialization code will be called.

The trace_printk() was replaced by pr_info() on commit 3d81099c
("media: atomisp: Replace trace_printk by pr_info") for the upstreamed
atomisp, too. However, as the aforementioned commit message says, there
is still a remaining instance. This causes the "trace_printk() being
used" kernel warning message to still appear on the first driver load.

Based on the aforementioned patch, this patch removes the call to
ftrace_vprintk(). This removes that kernel warning.

In addition to this, this patch also removes the following now unused
things:

    - now empty atomisp_css2_dbg_ftrace_print()
    - trace_printk option from dbg_func kernel parameter

Link: https://lore.kernel.org/r/20211017161958.44351-15-kitakar@gmail.comSigned-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_compat_css20.c

@@ -158,13 +158,6 @@ static void atomisp_css2_hw_load(hrt_address addr, void *to, uint32_t n)
 	spin_unlock_irqrestore(&mmio_lock, flags);
 }
 
-static int  __printf(1, 0) atomisp_css2_dbg_ftrace_print(const char *fmt,
-							 va_list args)
-{
-	ftrace_vprintk(fmt, args);
-	return 0;
-}
-
 static int  __printf(1, 0) atomisp_vprintk(const char *fmt, va_list args)
 {
 	vprintk(fmt, args);
@@ -801,9 +794,6 @@ static inline int __set_css_print_env(struct atomisp_device *isp, int opt)
 	if (opt == 0)
 		isp->css_env.isp_css_env.print_env.debug_print = NULL;
 	else if (opt == 1)
-		isp->css_env.isp_css_env.print_env.debug_print =
-		    atomisp_css2_dbg_ftrace_print;
-	else if (opt == 2)
 		isp->css_env.isp_css_env.print_env.debug_print = atomisp_vprintk;
 	else
 		ret = -EINVAL;

drivers/staging/media/atomisp/pci/atomisp_v4l2.c

@@ -64,10 +64,10 @@ module_param(dbg_level, int, 0644);
 MODULE_PARM_DESC(dbg_level, "debug message level (default:0)");
 
 /* log function switch */
-int dbg_func = 2;
+int dbg_func = 1;
 module_param(dbg_func, int, 0644);
 MODULE_PARM_DESC(dbg_func,
-		 "log function switch non/trace_printk/printk (default:printk)");
+		 "log function switch non/printk (default:printk)");
 
 int mipicsi_flag;
 module_param(mipicsi_flag, int, 0644);