board_f: Drop board_type parameter from initdram()

It looks like only cm5200 and tqm8xx use this feature, so we don't really
need it in generic code. Drop it and have the users access gd->board_type
directly.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/powerpc/cpu/mpc5xxx/spl_boot.c b/arch/powerpc/cpu/mpc5xxx/spl_boot.c
index e182dfb..23d2010 100644
--- a/arch/powerpc/cpu/mpc5xxx/spl_boot.c
+++ b/arch/powerpc/cpu/mpc5xxx/spl_boot.c
@@ -62,7 +62,7 @@
 	 * First we need to initialize the SDRAM, so that the real
 	 * U-Boot or the OS (Linux) can be loaded
 	 */
-	initdram(0);
+	initdram();
 
 	/* Clear bss */
 	memset(__bss_start, '\0', __bss_end - __bss_start);