arch/x86/cpu: move cpuid_match to corresponding header file

Since the functionality of cpuid_match is also useful outside of
arch/x86/cpu.c and it's a relatively simple function, move its
definition as inline function to the header file.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ic96746b33b01781543f60cf91904af35418e572d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72859
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/x86/cpu.c

@@ -188,11 +188,6 @@ static void identify_cpu(struct device *cpu)
 	}
 }
 
-static bool cpuid_match(uint32_t a, uint32_t b, uint32_t mask)
-{
-	return (a & mask) == (b & mask);
-}
-
 struct cpu_driver *find_cpu_driver(struct device *cpu)
 {
 	struct cpu_driver *driver;

src/arch/x86/include/arch/cpu.h

@@ -124,6 +124,11 @@ struct device;
 #define CPUID_EXACT_MATCH_MASK		0xffffffff
 #define CPUID_ALL_STEPPINGS_MASK	0xfffffff0
 
+static inline bool cpuid_match(uint32_t a, uint32_t b, uint32_t mask)
+{
+	return (a & mask) == (b & mask);
+}
+
 struct cpu_device_id {
 	unsigned int vendor;
 	uint32_t device;