dtc: fix build if swig is installed

dtc/.signature

@@ -1,5 +1,6 @@
 untrusted comment: verify with /etc/ports/opt.pub
-RWSE3ohX2g5d/Uz1ZPelufLUm160jtOkiVA2KIfb1Yq6ZCm9G1cmF4p8wxgG39bYsq15jZ8lAq8QANAEItPBKhaNBSLg5qqAzQE=
-SHA256 (Pkgfile) = e12186d72e675899a01aa658b4c94db8aa426221f3851850619fa7f5f7ba42d9
+RWSE3ohX2g5d/eIIa9GkuWvuvdIyiO0XTUcFWb3/qibaSp79tPE5zv51xA4HKqvF18ZteivNhfxfMBDzA56s4UG3xocimZwwFgI=
+SHA256 (Pkgfile) = 51e1f36cc124e0f80d45a266d1136e12ebfb333204b6cdf1e63a8d786a78046f
 SHA256 (.footprint) = d11e3a31345e5fb0aad1b36197a5b9aec939421d67c4957b506198126a56f15a
 SHA256 (dtc-1.7.0.tar.xz) = 29edce3d302a15563d8663198bbc398c5a0554765c83830d0d4c0409d21a16c4
+SHA256 (pyscm.patch) = 332f69313911cd174758ee5462b67d96ae3cfe7810eb7b94cb340524ce7d1665

dtc/Pkgfile

@@ -4,12 +4,14 @@
 
 name=dtc
 version=1.7.0
-release=1
-source=(https://www.kernel.org/pub/software/utils/$name/$name-$version.tar.xz)
+release=2
+source=(https://www.kernel.org/pub/software/utils/$name/$name-$version.tar.xz
+	pyscm.patch)
 
 build() {
 	sed '/version:/s/6/7/' -i $name-$version/{,libfdt}/meson.build
 	CFLAGS+=" -ffat-lto-objects"
+	patch -p1 -d $name-$version -i $SRC/pyscm.patch
 
 	meson setup build $name-$version \
 		--prefix=/usr \

dtc/pyscm.patch

@@ -0,0 +1,18 @@
+diff --git a/setup.py b/setup.py
+index e82a832..da01efd 100755
+--- a/setup.py
++++ b/setup.py
+@@ -49,11 +49,8 @@ class build_py(_build_py):
+ 
+ setup(
+     name='libfdt',
+-    use_scm_version={
+-        "root": srcdir,
+-    },
+     cmdclass = {'build_py' : build_py},
+-    setup_requires = ['setuptools_scm'],
++    version="1.7.0",
+     author='Simon Glass',
+     author_email='sjg@chromium.org',
+     description='Python binding for libfdt',
+