cpu/allwinner/a10: Clean up include order in Makefile.inc

Alphabetize the sources for each stage (bootblock, rom, ram), and
include twi.c in both romstage and ramstage.

Change-Id: I5526f5a66f6600560005731a3ee536eb858f4ff0
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4639
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/allwinner/a10/Makefile.inc

@@ -1,23 +1,27 @@
+bootblock-y	+= bootblock_media.c
 bootblock-y	+= clock.c
-bootblock-y	+= raminit.c
 bootblock-y	+= gpio.c
 bootblock-y	+= pinmux.c
+bootblock-y	+= raminit.c
 bootblock-y	+= timer.c
-bootblock-y	+= bootblock_media.c
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart_console.c
 
+romstage-y	+= bootblock_media.c
+romstage-y	+= clock.c
+romstage-y	+= pinmux.c
+romstage-y	+= timer.c
+romstage-y	+= twi.c
 romstage-y	+= uart.c
 romstage-y	+= uart_console.c
-romstage-y	+= bootblock_media.c
 
-ramstage-y	+= uart.c
-ramstage-y	+= uart_console.c
+ramstage-y	+= bootblock_media.c
+ramstage-y	+= clock.c
+ramstage-y	+= monotonic_timer.c
 ramstage-y	+= timer.c
 ramstage-y	+= twi.c
-ramstage-y	+= monotonic_timer.c
-ramstage-y	+= bootblock_media.c
-
+ramstage-y	+= uart.c
+ramstage-y	+= uart_console.c
 
 real-target: $(obj)/BOOT0