x86/dtb: Rename x86_dtb_init()

x86_dtb_init() is a misnomer and it really should be used as a SMP
configuration parser which is selected by the platform via
x86_init::mpparse:parse_smp_config().

Rename it to x86_dtb_parse_smp_config() in preparation for that.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Link: https://lore.kernel.org/r/20240212154639.495992801@linutronix.de

arch/x86/include/asm/prom.h

@@ -23,11 +23,11 @@ extern int of_ioapic;
 extern u64 initial_dtb;
 extern void add_dtb(u64 data);
 void x86_of_pci_init(void);
-void x86_dtb_init(void);
+void x86_dtb_parse_smp_config(void);
 #else
 static inline void add_dtb(u64 data) { }
 static inline void x86_of_pci_init(void) { }
-static inline void x86_dtb_init(void) { }
+static inline void x86_dtb_parse_smp_config(void) { }
 #define of_ioapic 0
 #endif
 

arch/x86/kernel/devicetree.c

@@ -302,7 +302,7 @@ void __init x86_flattree_get_config(void)
 }
 #endif
 
-void __init x86_dtb_init(void)
+void __init x86_dtb_parse_smp_config(void)
 {
 	if (!of_have_populated_dt())
 		return;

arch/x86/kernel/setup.c

@@ -1133,7 +1133,7 @@ void __init setup_arch(char **cmdline_p)
 	 * Read APIC and some other early information from ACPI tables.
 	 */
 	acpi_boot_init();
-	x86_dtb_init();
+	x86_dtb_parse_smp_config();
 
 	/*
 	 * get boot-time SMP configuration: