efi_loader: Add guidcpy function

Add guidcpy function to copy the source guid to the destination
guid. Use this function instead of memcpy for copying to the
destination guid.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>

Use void * instead of efi_guid_t * for arguments to allow copying unaligned
GUIDs. The GUIDs of configuration tables are __packed.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 4d401f6..e1c9b1f 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -17,6 +17,11 @@
 	return memcmp(g1, g2, sizeof(efi_guid_t));
 }
 
+static inline void *guidcpy(void *dst, const void *src)
+{
+	return memcpy(dst, src, sizeof(efi_guid_t));
+}
+
 /* No need for efi loader support in SPL */
 #if CONFIG_IS_ENABLED(EFI_LOADER)