x86: k8 convert node_to_k8_nb_misc() from a macro to an inline function

Converting node_to_k8_nb_misc() from a macro to an inline function
makes compiler see the 'node' parameter in the !CONFIG_K8_NB too,
which eliminates these compiler warnings:

  arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘show_cache_disable’:
  arch/x86/kernel/cpu/intel_cacheinfo.c:712: warning: unused variable ‘node’
  arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
  arch/x86/kernel/cpu/intel_cacheinfo.c:739: warning: unused variable ‘node’

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Mark Langsdorf <mark.langsdorf@amd.com>
LKML-Reference: <1239730477.2966.26.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/include/asm/k8.h

@@ -13,10 +13,15 @@ extern void k8_flush_garts(void);
 extern int k8_scan_nodes(unsigned long start, unsigned long end);
 
 #ifdef CONFIG_K8_NB
-#define node_to_k8_nb_misc(node) \
-	(node < num_k8_northbridges) ? k8_northbridges[node] : NULL
+static inline struct pci_dev *node_to_k8_nb_misc(int node)
+{
+	return (node < num_k8_northbridges) ? k8_northbridges[node] : NULL;
+}
 #else
-#define node_to_k8_nb_misc(node) NULL
+static inline struct pci_dev *node_to_k8_nb_misc(int node)
+{
+	return NULL;
+}
 #endif