bcm53xx: drop unused (and broken) GPIOLIB patch

First of all this patch was broken since adding 3.18 for bcm53xx. It was
modifying ARCH_BRCMSTB instead of ARCH_BCM_5301X.
Secondly we don't need it as ARCH_MULTIPLATFORM selects
ARCH_WANT_OPTIONAL_GPIOLIB for us.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 44383

target/linux/bcm53xx/patches-3.18/302-ARM-BCM5301X-select-GPIOLIB-as-optional.patch

@@ -1,29 +0,0 @@
-From e7b1065712e769eb4de7b9d4aa222a4531c2b8fd Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
-Date: Sat, 20 Sep 2014 18:21:19 +0200
-Subject: [PATCH V2] ARM: BCM5301X: select GPIOLIB as optional
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-All routers (or 99% of them) based on BCM5301X use GPIOs to control LEDs
-and buttons.
-
-Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
----
-V2: Don't select GPIOLIB. We may still think about making it default at
-    some point, but we dont' really require it to boot successfully.
----
- arch/arm/mach-bcm/Kconfig | 1 +
- 1 file changed, 1 insertion(+)
-
---- a/arch/arm/mach-bcm/Kconfig
-+++ b/arch/arm/mach-bcm/Kconfig
-@@ -120,6 +120,7 @@ config ARCH_BCM_63XX
- config ARCH_BRCMSTB
- 	bool "Broadcom BCM7XXX based boards" if ARCH_MULTI_V7
- 	depends on MMU
-+	select ARCH_WANT_OPTIONAL_GPIOLIB
- 	select ARM_GIC
- 	select MIGHT_HAVE_PCI
- 	select HAVE_SMP