ath79: drop upstreamed patch

Patch was upstreamed a long time ago (over 2 years) as commit
a08227a206b8d ("MIPS: ath79: select the PINCTRL subsystem").

When porting this patch to a newer kernel, nobody noticed we now patch a
Broadcom platform. This is clearly not intended. So drop this patch and
pretend nothing ever happened.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/ath79/patches-5.4/0011-MIPS-ath79-select-the-PINCTRL-subsystem.patch

@@ -1,24 +0,0 @@
-From 0c8856211d26f84277f7fcb0b9595e5c646bc464 Mon Sep 17 00:00:00 2001
-From: John Crispin <john@phrozen.org>
-Date: Tue, 6 Mar 2018 10:00:55 +0100
-Subject: [PATCH 11/33] MIPS: ath79: select the PINCTRL subsystem
-
-The pinmux on QCA SoCs is controlled by a single register. The
-"pinctrl-single" driver can be used but requires the target
-to select PINCTRL.
-
-Signed-off-by: John Crispin <john@phrozen.org>
----
- arch/mips/Kconfig | 1 +
- 1 file changed, 1 insertion(+)
-
---- a/arch/mips/Kconfig
-+++ b/arch/mips/Kconfig
-@@ -296,6 +296,7 @@ config BCM63XX
- 	select SYS_HAS_EARLY_PRINTK
- 	select SWAP_IO_SPACE
- 	select GPIOLIB
-+	select PINCTRL
- 	select HAVE_CLK
- 	select MIPS_L1_CACHE_SHIFT_4
- 	select CLKDEV_LOOKUP