[ARM] Separate page table manipulation code from bootmem initialisation

nommu does not require the page table manipulation code in the
bootmem initialisation paths.  Move this into separate inline
functions.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/setup.h

@@ -194,13 +194,15 @@ static struct tagtable __tagtable_##fn __tag = { tag, fn }
 # define NR_BANKS 8
 #endif
 
+struct membank {
+	unsigned long start;
+	unsigned long size;
+	int           node;
+};
+
 struct meminfo {
 	int nr_banks;
-	struct {
-		unsigned long start;
-		unsigned long size;
-		int           node;
-	} bank[NR_BANKS];
+	struct membank bank[NR_BANKS];
 };
 
 /*