efi: Export symbol efi_mem_desc_lookup

Building efidrm as module requires efi_mem_desc_lookup(). Export
the symbol.

Signed-off-by: Thomas Zimmermann <[email protected]>
Acked-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: tdz

drivers/firmware/efi/efi.c

@@ -558,6 +558,7 @@ int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 
 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
 	__weak __alias(__efi_mem_desc_lookup);
+EXPORT_SYMBOL_GPL(efi_mem_desc_lookup);
 
 /*
  * Calculate the highest address of an efi memory descriptor.