rtc-rv5c386a: package does not build inside the SDK

the packages failed to build inside the SDK due to missing header
files.

Signed-off-by: John Crispin <john@phrozen.org>

package/kernel/rtc-rv5c386a/Makefile

@@ -15,7 +15,7 @@ include $(INCLUDE_DIR)/package.mk
 
 define KernelPackage/rtc-rv5c386a
   SUBMENU:=Other modules
-  DEPENDS:=@TARGET_brcm47xx
+  DEPENDS:=@TARGET_brcm47xx @!IN_SDK
   TITLE:=Driver for RTC RV5C386A (used in WL-700gE and WL-HDD)
   AUTOLOAD:=$(call AutoLoad,70,rtc)
   FILES:=$(PKG_BUILD_DIR)/rtc.ko