ppc4xx: Fix include sequence in 4xx_pcie.c

This patch now moves common.h to the top of the inlcude list. This
is needed for boards with CONFIG_PHYS_64BIT set (e.g. katmai), so that
the phys_size_t/phys_addr_t are defined to the correct size in this
driver.

Signed-off-by: Stefan Roese <sr@denx.de>

cpu/ppc4xx/4xx_pcie.c

@@ -25,11 +25,11 @@
 #define DEBUG
 #endif
 
-#include <asm/processor.h>
-#include <asm-ppc/io.h>
-#include <ppc4xx.h>
 #include <common.h>
 #include <pci.h>
+#include <ppc4xx.h>
+#include <asm/processor.h>
+#include <asm-ppc/io.h>
 
 #if (defined(CONFIG_440SPE) || defined(CONFIG_405EX) ||	\
     defined(CONFIG_460EX) || defined(CONFIG_460GT)) && \