Makefile.mk: Account for large code model sections in cbfs_struct

Starting with version 18 LLVM puts code and data generated with
-ffunction-section -mcmodel=large inside sections with an 'l' prefix.
This would now also pick up const data in .rodata.

Change-Id: Ie07779ef548337772183ffe2d642f971d8cceae7
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81777
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/Makefile.mk b/Makefile.mk
index d7110a9..e642ac7 100644
--- a/Makefile.mk
+++ b/Makefile.mk
@@ -366,7 +366,8 @@
 	$(eval $(2): $(1) $(obj)/build.h $(obj)/fmap_config.h $(KCONFIG_AUTOHEADER); \
 		printf "    CC+STRIP   $(1)\n"; \
 		$(CC_ramstage) -MMD $(CPPFLAGS_ramstage) $(CFLAGS_ramstage) --param asan-globals=0 $$(ramstage-c-ccopts) -include $(KCONFIG_AUTOHEADER) -MT $(2) -o $(2).tmp -c $(1) && \
-		$(OBJCOPY_ramstage) -O binary --only-section='.data*' --only-section='.bss*' --set-section-flags .bss*=alloc,contents,load $(2).tmp $(2); \
+		$(OBJCOPY_ramstage) -O binary --only-section='.*data*' --only-section='.*bss*' \
+		--set-section-flags .*bss*=alloc,contents,load $(2).tmp $(2); \
 		rm -f $(2).tmp) \
 	$(eval DEPENDENCIES += $(2).d)