x86/hyperv: Make hv_get_nmi_reason public

Move hv_get_nmi_reason to .h file so it can be used in other
modules as well.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1681192532-15460-4-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

Author: Saurabh Sengar

arch/x86/include/asm/mshyperv.h

@@ -29,6 +29,11 @@ typedef int (*hyperv_fill_flush_list_func)(
 
 void hyperv_vector_handler(struct pt_regs *regs);
 
+static inline unsigned char hv_get_nmi_reason(void)
+{
+	return 0;
+}
+
 #if IS_ENABLED(CONFIG_HYPERV)
 extern int hyperv_init_cpuhp;
 

arch/x86/kernel/cpu/mshyperv.c

@@ -248,11 +248,6 @@ static uint32_t  __init ms_hyperv_platform(void)
 	return HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS;
 }
 
-static unsigned char hv_get_nmi_reason(void)
-{
-	return 0;
-}
-
 #ifdef CONFIG_X86_LOCAL_APIC
 /*
  * Prior to WS2016 Debug-VM sends NMIs to all CPUs which makes