efi_loader: enable RNG if DM_RNG is enabled

Enable EFI_RNG_PROTOCOL by default if DM_RNG is set.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Acked-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Remove superfluous 'if DM_RNG'
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 9890144..c89ce85 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -126,6 +126,7 @@
 config EFI_RNG_PROTOCOL
 	bool "EFI_RNG_PROTOCOL support"
 	depends on DM_RNG
+	default y
 	help
 	  Provide a EFI_RNG_PROTOCOL implementation using the hardware random
 	  number generator of the platform.