efi_loader: capsule: drop __weak from efi_get_public_key_data()

As we discussed in ML, currently a device tree is the only place
to store public keys for capsule authentication. So __weak is not
necessary for now.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c
index 44f5da6..850937f 100644
--- a/lib/efi_loader/efi_capsule.c
+++ b/lib/efi_loader/efi_capsule.c
@@ -256,7 +256,7 @@
 }
 
 #if defined(CONFIG_EFI_CAPSULE_AUTHENTICATE)
-int __weak efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len)
+int efi_get_public_key_data(void **pkey, efi_uintn_t *pkey_len)
 {
 	const void *fdt_blob = gd->fdt_blob;
 	const void *blob;