bcm4908: add simple PCIe reset controller support

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/bcm4908/patches-5.4/081-v5.12-reset-simple-add-BCM4908-MISC-PCIe-reset-controller-.patch

@@ -0,0 +1,40 @@
+From def26913b66fd94e431afecf28e09c08e8c02a35 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Fri, 27 Nov 2020 12:14:42 +0100
+Subject: [PATCH] reset: simple: add BCM4908 MISC PCIe reset controller support
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It's a trivial reset controller. One register with bit per PCIe core.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
+---
+ drivers/reset/Kconfig        | 2 +-
+ drivers/reset/reset-simple.c | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+--- a/drivers/reset/Kconfig
++++ b/drivers/reset/Kconfig
+@@ -129,7 +129,7 @@ config RESET_SCMI
+ 
+ config RESET_SIMPLE
+ 	bool "Simple Reset Controller Driver" if COMPILE_TEST
+-	default ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED || ARCH_BITMAIN || ARC
++	default ARCH_BCM4908 || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED || ARCH_BITMAIN || ARC
+ 	help
+ 	  This enables a simple reset controller driver for reset lines that
+ 	  that can be asserted and deasserted by toggling bits in a contiguous,
+--- a/drivers/reset/reset-simple.c
++++ b/drivers/reset/reset-simple.c
+@@ -127,6 +127,8 @@ static const struct of_device_id reset_s
+ 	{ .compatible = "aspeed,ast2500-lpc-reset" },
+ 	{ .compatible = "bitmain,bm1880-reset",
+ 		.data = &reset_simple_active_low },
++	{ .compatible = "brcm,bcm4908-misc-pcie-reset",
++		.data = &reset_simple_active_low },
+ 	{ .compatible = "snps,dw-high-reset" },
+ 	{ .compatible = "snps,dw-low-reset",
+ 		.data = &reset_simple_active_low },