siemens-am33x-common.h: Always build CONFIG_OMAP_GPIO support

The MMC driver relies on this block now.

Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/configs/siemens-am33x-common.h b/include/configs/siemens-am33x-common.h
index f0bac97..5426ee8 100644
--- a/include/configs/siemens-am33x-common.h
+++ b/include/configs/siemens-am33x-common.h
@@ -447,9 +447,7 @@
 #endif
 #endif
 
-#ifndef CONFIG_SPL_BUILD
 #define CONFIG_OMAP_GPIO
-#endif
 
 /* Watchdog */
 #define CONFIG_HW_WATCHDOG