MIPS: Alchemy: Remove time_lock.

The sole user is au1xxx_calc_clock() which is only used in early bootup
where the is no paralellism thus no race condition to protect against.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>

arch/mips/alchemy/common/clocks.c

@@ -40,8 +40,6 @@
 static unsigned int au1x00_clock; /*  Hz */
 static unsigned long uart_baud_base;
 
-static DEFINE_SPINLOCK(time_lock);
-
 /*
  * Set the au1000_clock
  */
@@ -84,9 +82,6 @@ void set_au1x00_uart_baud_base(unsigned long new_baud_base)
 unsigned long au1xxx_calc_clock(void)
 {
 	unsigned long cpu_speed;
-	unsigned long flags;
-
-	spin_lock_irqsave(&time_lock, flags);
 
 	/*
 	 * On early Au1000, sys_cpupll was write-only. Since these
@@ -108,8 +103,6 @@ unsigned long au1xxx_calc_clock(void)
 	set_au1x00_uart_baud_base(cpu_speed / (2 * ((int)(au_readl(SYS_POWERCTRL)
 							  & 0x03) + 2) * 16));
 
-	spin_unlock_irqrestore(&time_lock, flags);
-
 	set_au1x00_speed(cpu_speed);
 
 	return cpu_speed;