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/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 5b356dd..1a77c98 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -110,6 +110,12 @@
 } gd_t;
 #endif
 
+#ifdef CONFIG_BOARD_TYPES
+#define gd_board_type()		gd->board_type
+#else
+#define gd_board_type()		0
+#endif
+
 /*
  * Global Data Flags - the top 16 bits are reserved for arch-specific flags
  */