[IA64] Rename platform_name to ia64_platform_name

The macro name is too generic and conflicts with
snd_soc_dai_link.platform_name, which triggers lots of build errors.

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h
index 832dd37..944152a 100644
--- a/arch/ia64/include/asm/processor.h
+++ b/arch/ia64/include/asm/processor.h
@@ -719,7 +719,7 @@
 
 void default_idle(void);
 
-#define ia64_platform_is(x) (strcmp(x, platform_name) == 0)
+#define ia64_platform_is(x) (strcmp(x, ia64_platform_name) == 0)
 
 #endif /* !__ASSEMBLY__ */