firmware-phicomm-n1: update to 7.6, changes: do not hardcode mmc device name

firmware-phicomm-n1/PKGBUILD

@@ -4,7 +4,7 @@ buildarch=28
 
 pkgname=firmware-phicomm-n1
 pkgver=7
-pkgrel=5
+pkgrel=6
 pkgdesc="Additional firmware for Phicomm N1"
 arch=('any')
 conflicts=('firmware-raspberrypi')

firmware-phicomm-n1/firmware-phicomm-n1.install

@@ -6,7 +6,9 @@ post_install() {
 post_upgrade() {
     # get uboot wifi macaddr 
     tmpfile=$(mktemp -p /tmp)
-    echo '/dev/mmcblk1   0x27400000   0x10000' > $tmpfile
+    # found in 5.10.1 kernel, mmc device name may be inconsistent across reboots, so we avoid hardcoding
+    mmcdevname=$(lsblk -d | grep -v 'mmcblk.boot' | grep mmcblk | xargs | cut -d ' ' -f1)
+    echo "/dev/${mmcdevname}   0x27400000   0x10000" > $tmpfile
     mac_wifi=$(fw_printenv -c $tmpfile mac_wifi)
     rm $tmpfile
     mac=${mac_wifi#*=}