northbridge/amd/agesa/family1{4,5,5tn,6kb}: Reduce differences

Lets cut down on whitespace differences, fix some typos and indents.
Also make use of ARRAY_SIZE() macro instead of a local redefinition.

Fix NULL pointer checks ordering and not to use zero.

Change-Id: I93f344d300c04570d795659d848255cb1832e1d8
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/7528
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/northbridge/amd/agesa/family14/Kconfig b/src/northbridge/amd/agesa/family14/Kconfig
index e0edebc..971f271 100644
--- a/src/northbridge/amd/agesa/family14/Kconfig
+++ b/src/northbridge/amd/agesa/family14/Kconfig
@@ -32,10 +32,10 @@
 
 config MMCONF_BASE_ADDRESS
 	hex
-	default 0xf8000000
+	default 0xF8000000
 
 config MMCONF_BUS_NUMBER
 	int
 	default 16
 
-endif
+endif # NORTHBRIDGE_AMD_AGESA_FAMILY14