kernel: generic backport 6.1: rename mistyped .patch file

Rename mistyped file .patc to patch

Fixes: ac8bfe316b ("generic: 6.1, 6.6: mt7530: import accepted patches")
Signed-off-by: Antonio Flores <antflores627@gmail.com>

diff --git a/target/linux/generic/backport-6.1/790-49-v6.10-net-dsa-mt7530-provide-own-phylink-MAC-operations.patc b/target/linux/generic/backport-6.1/790-49-v6.10-net-dsa-mt7530-provide-own-phylink-MAC-operations.patch
similarity index 100%
rename from target/linux/generic/backport-6.1/790-49-v6.10-net-dsa-mt7530-provide-own-phylink-MAC-operations.patc
rename to target/linux/generic/backport-6.1/790-49-v6.10-net-dsa-mt7530-provide-own-phylink-MAC-operations.patch