driver, gpio: Add support for MPC 8xx CPU ports

Ports A, C and D are 16 bits ports.
Ports B and E are 32 bits ports.

The "compatible" is used to determine each port type.

This patch was originally written by Charles Frey who's
email address is not valid anymore as he left the company.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: FRANJOU Stephane <stephane.franjou@csgroup.eu>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e0801c2..bee59c3 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -28,6 +28,7 @@
 
 config MPC8xx
 	bool "MPC8xx"
+	select CREATE_ARCH_SYMLINK
 	select BOARD_EARLY_INIT_F
 	imply CMD_REGINFO
 	imply WDT_MPC8xx