payloads/tianocore: Fix orphaned reference to 'bootloader' variable

commit d3b49b4
[payloads/Tianocore: Update default build target, simplify build options]
simplified the build string and removed the bootloader Makefile variable,
but one reference was missed. Luckily the variable being empty didn't
break things, but correct it regardless.

Change-Id: If37b291dda59c20bfe4c6e5b9100fac52d11a2f4
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55239
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/payloads/external/tianocore/Makefile b/payloads/external/tianocore/Makefile
index e23d946..92a809a 100644
--- a/payloads/external/tianocore/Makefile
+++ b/payloads/external/tianocore/Makefile
@@ -94,7 +94,7 @@
 			cat ../tools_def.txt >> $(project_dir)/Conf/tools_def.txt; \
 		fi; \
 		build $(BUILD_STR); \
-		mv $(project_dir)/Build/$(bootloader)*/*/FV/UEFIPAYLOAD.fd $(project_dir)/Build/UEFIPAYLOAD.fd; \
+		mv $(project_dir)/Build/UefiPayloadPkg*/*/FV/UEFIPAYLOAD.fd $(project_dir)/Build/UEFIPAYLOAD.fd; \
 		git checkout MdeModulePkg/Logo/Logo.bmp > /dev/null 2>&1 || true
 
 clean: