x86/cpuid: Rename have_cpuid_p() to cpuid_feature()

In order to let all the APIs under <cpuid/api.h> have a shared "cpuid_"
namespace, rename have_cpuid_p() to cpuid_feature().

Adjust all call-sites accordingly.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: x86-cpuid@lists.linux.dev
Link: https://lore.kernel.org/r/20250508150240.172915-4-darwi@linutronix.de

Author: Ahmed S. Darwish

arch/x86/include/asm/cpuid/api.h

@@ -14,9 +14,9 @@
  */
 
 #ifdef CONFIG_X86_32
-bool have_cpuid_p(void);
+bool cpuid_feature(void);
 #else
-static inline bool have_cpuid_p(void)
+static inline bool cpuid_feature(void)
 {
 	return true;
 }

arch/x86/kernel/cpu/common.c

@@ -322,7 +322,7 @@ static int __init cachesize_setup(char *str)
 __setup("cachesize=", cachesize_setup);
 
 /* Probe for the CPUID instruction */
-bool have_cpuid_p(void)
+bool cpuid_feature(void)
 {
 	return flag_is_changeable_p(X86_EFLAGS_ID);
 }
@@ -1711,11 +1711,11 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 	memset(&c->x86_capability, 0, sizeof(c->x86_capability));
 	c->extended_cpuid_level = 0;
 
-	if (!have_cpuid_p())
+	if (!cpuid_feature())
 		identify_cpu_without_cpuid(c);
 
 	/* cyrix could have cpuid enabled via c_identify()*/
-	if (have_cpuid_p()) {
+	if (cpuid_feature()) {
 		cpu_detect(c);
 		get_cpu_vendor(c);
 		intel_unlock_cpuid_leafs(c);
@@ -1875,11 +1875,11 @@ static void generic_identify(struct cpuinfo_x86 *c)
 {
 	c->extended_cpuid_level = 0;
 
-	if (!have_cpuid_p())
+	if (!cpuid_feature())
 		identify_cpu_without_cpuid(c);
 
 	/* cyrix could have cpuid enabled via c_identify()*/
-	if (!have_cpuid_p())
+	if (!cpuid_feature())
 		return;
 
 	cpu_detect(c);

arch/x86/kernel/cpu/microcode/core.c

@@ -118,7 +118,7 @@ bool __init microcode_loader_disabled(void)
 	 * 3) Certain AMD patch levels are not allowed to be
 	 *    overwritten.
 	 */
-	if (!have_cpuid_p() ||
+	if (!cpuid_feature() ||
 	    native_cpuid_ecx(1) & BIT(31) ||
 	    amd_check_current_patch_level())
 		dis_ucode_ldr = true;