kernel: drop apu2 reboot patch

This patch really annoys me, either it needs to go upstream or be
dropped, so it's going to be dropped here.

Checking drivers/platform/x86/pcengines-apuv2.c it also appears to be
incomplete since it mentions different dmi board names depending on bios
version.

/* APU2 w/ legacy BIOS < 4.0.8 */ is 'APU2'
/* APU2 w/ legacy BIOS >= 4.0.8 */ is 'apu2'
/* APU2 w/ mainline BIOS */ is 'PC Engines apu2'

So the patch, if applicable at all, only 'works' for legacy BIOS >=
4.0.8

My APU2 on mainline BIOS reboots fine without this patch.  So let's see
if anyone screams and when they do question why legacy bios.  If patch
DOES need to be re-introduced then it needs to go upstream first.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

target/linux/x86/patches-5.10/200-pcengines-apu2-reboot.patch

@@ -1,19 +0,0 @@
---- a/arch/x86/kernel/reboot.c
-+++ b/arch/x86/kernel/reboot.c
-@@ -486,6 +486,16 @@ static const struct dmi_system_id reboot
- 		},
- 	},
- 
-+	/* PC Engines */
-+	{	/* Handle problems with rebooting on PC Engines apu2 */
-+		.callback = set_pci_reboot,
-+		.ident = "PC Engines apu2",
-+		.matches = {
-+			DMI_MATCH(DMI_BOARD_VENDOR, "PC Engines"),
-+			DMI_MATCH(DMI_BOARD_NAME, "apu2"),
-+		},
-+	},
-+
- 	/* Sony */
- 	{	/* Handle problems with rebooting on Sony VGN-Z540N */
- 		.callback = set_bios_reboot,

target/linux/x86/patches-5.4/200-pcengines-apu2-reboot.patch

@@ -1,19 +0,0 @@
---- a/arch/x86/kernel/reboot.c
-+++ b/arch/x86/kernel/reboot.c
-@@ -486,6 +486,16 @@ static const struct dmi_system_id reboot
- 		},
- 	},
- 
-+	/* PC Engines */
-+	{	/* Handle problems with rebooting on PC Engines apu2 */
-+		.callback = set_pci_reboot,
-+		.ident = "PC Engines apu2",
-+		.matches = {
-+			DMI_MATCH(DMI_BOARD_VENDOR, "PC Engines"),
-+			DMI_MATCH(DMI_BOARD_NAME, "apu2"),
-+		},
-+	},
-+
- 	/* Sony */
- 	{	/* Handle problems with rebooting on Sony VGN-Z540N */
- 		.callback = set_bios_reboot,