Tweak Rasperry Pi enviroment to avoid broken macro expansion

The Raspberry Pi environment appears to now be being automatically
escaped, however we are already manually escaping in places that results
in unexpected double escaping and breakage during macro expansion:

[ 1979s] include/generated/environment.h:1:296: error: expected ‘}’ before ‘extlinux’
[ 1979s]     1 | #define CONFIG_EXTRA_ENV_TEXT ...   ...boot_syslinux_conf \\"extlinux/extlinux...
[ 1979s]       |                                                              ^~~~~~~~

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

debian/patches/apertis/rpi/0059-Tweak-Rasperry-Pi-enviroment-to-avoid-broken-macro-e.patch

+From: Martyn Welch <martyn.welch@collabora.com>
+Date: Fri, 26 Jan 2024 10:43:16 +0000
+Subject: Tweak Rasperry Pi enviroment to avoid broken macro expansion
+MIME-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 8bit
+
+The Raspberry Pi environment appears to now be being automatically
+escaped, however we are already manually escaping in places that results
+in unexpected double escaping and breakage during macro expansion:
+
+[ 1979s] include/generated/environment.h:1:296: error: expected ‘}’ before ‘extlinux’
+[ 1979s]     1 | #define CONFIG_EXTRA_ENV_TEXT ...   ...boot_syslinux_conf \\"extlinux/extlinux...
+[ 1979s]       |                                                              ^~~~~~~~
+
+Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
+---
+ board/raspberrypi/rpi/rpi.env | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/board/raspberrypi/rpi/rpi.env b/board/raspberrypi/rpi/rpi.env
+index 887b2d9..96a3083 100644
+--- a/board/raspberrypi/rpi/rpi.env
++++ b/board/raspberrypi/rpi/rpi.env
+@@ -9,7 +9,7 @@ stdin=serial,usbkbd
+ stdout=serial,vidconsole
+ stderr=serial,vidconsole
+ bootlimit=3
+-altbootcmd=setenv boot_syslinux_conf \"extlinux/extlinux-rollback.conf\"; run distro_bootcmd
++altbootcmd=setenv boot_syslinux_conf "extlinux/extlinux-rollback.conf"; run distro_bootcmd
+ 
+ /* DFU over USB/UDC */
+ #ifdef CONFIG_CMD_DFU

debian/patches/series

@@ -64,6 +64,7 @@ apertis/rpi/0012-arm-rpi-Add-generic-device-tree-for-RPi-CM4-boards.patch
 apertis/rpi/0013-ARM-dts-bcm2711-rpi-4-b-Use-aliases-to-set-custom-MM.patch
 apertis/rpi/0014-ARM-dts-bcm2711-rpi-cm4-Use-aliases-to-set-custom-MM.patch
 apertis/rpi/0015-ARM-dts-Add-bcm2711-vl805-device-tree-overlay.patch
+apertis/rpi/0059-Tweak-Rasperry-Pi-enviroment-to-avoid-broken-macro-e.patch
 
 # Support for Rockchip boards
 apertis/rk3399/0001-rockchip-rock-pi-4-Add-bootcount-config.patch