patches/flash-kernel: use patch from MR

patches/flash-kernel

 #!/bin/sh
 set -e
+# https://salsa.debian.org/installer-team/flash-kernel/-/merge_requests/33/diffs
 patch -p1 << 'EOF'
 diff --git a/functions b/functions
-index a2e2b31..5899e59 100644
+index a2e2b311ceeee65460286c83fc4a9e6d7b06eec2..d04d7620a10e6d2344ee7a8313c5f15edb53f6fc 100644
 --- a/functions
 +++ b/functions
-@@ -789,13 +789,12 @@ if [ -L "$kfile" ]; then
+@@ -789,8 +789,8 @@ if [ -L "$kfile" ]; then
  	kfile=$(readlink -e "$kfile")
  fi
  
 -if [ -d /sys/firmware/efi ]; then
 -	# skipping when detect EFI
--	echo "System running in EFI mode, skipping."
--	exit 0
--fi
--
- if ! check_supported "$machine"; then
-+	# do nothing if an unsupported platform is booted from EFI
-+	if [ -d /sys/firmware/efi ]; then
-+		echo "Unsupported platform on EFI system, doing nothing."
-+		exit 0
-+	fi
- 	error "Unsupported platform '$machine'."
++if ! ischroot && [ -d /sys/firmware/efi ]; then
++	# skipping when detect EFI and we are not running inside a chroot
+ 	echo "System running in EFI mode, skipping."
+ 	exit 0
  fi
- 
 EOF