dt-bindings: Makefile: Allow for symlinks to find bindings

Allow for bindings to be found via symlinks.

Change-Id: I095931fb2fb50f1886a22d793df447c358fd0b14
Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>

bindings/Makefile

@@ -25,7 +25,7 @@ quiet_cmd_extract_ex = DTEX    $@
 $(obj)/%.example.dts: $(src)/%.yaml check_dtschema_version FORCE
 	$(call if_changed,extract_ex)
 
-find_all_cmd = find $(srctree)/$(src) \( -name '*.yaml' ! \
+find_all_cmd = find -L $(srctree)/$(src) \( -name '*.yaml' ! \
 		-name 'processed-schema*' \)
 
 find_cmd = $(find_all_cmd) | grep -F "$(DT_SCHEMA_FILES)"