meta-nuvoton: npcm8xx-igps: use sed instead of patch

This method is less likely to break and require fixes when Nuvoton
adjusts the XML files.

Tested: Still able to build successfully
Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Change-Id: Ib8e67b67cd837d1d5510ab326012d0644b3a2780
diff --git a/meta-nuvoton/recipes-bsp/images/npcm8xx-igps.inc b/meta-nuvoton/recipes-bsp/images/npcm8xx-igps.inc
index c4202e4..5d64d17 100644
--- a/meta-nuvoton/recipes-bsp/images/npcm8xx-igps.inc
+++ b/meta-nuvoton/recipes-bsp/images/npcm8xx-igps.inc
@@ -7,13 +7,17 @@
 IGPS_BRANCH ?= "main"
 SRC_URI = " \
     git://github.com/Nuvoton-Israel/igps-npcm8xx;branch=${IGPS_BRANCH};protocol=https \
-    file://0001-Adjust-paths-for-use-with-Bitbake.patch \
 "
 
 S = "${WORKDIR}/git"
 
 DEST = "${D}${datadir}/${BPN}"
 
+# Adjust paths for use with bitbake
+do_patch() {
+	sed -i -e 's,inputs/,,g' ${S}/py_scripts/ImageGeneration/{references,inputs}/*.xml
+}
+
 do_install() {
 	install -d ${DEST}
 	install py_scripts/ImageGeneration/references/BootBlockAndHeader_${DEVICE_GEN}_${IGPS_MACHINE}.xml ${DEST}