kernel: add Qualcomm SSDK driver

Qualcomm SSDK is driver for Qualcomm Atheros switches and PHY-s.

It is quite complicated and used by rest of the Qualcomm SDK stack for
anything switch or PHY related.

It is required for IPQ807x support as currently, there is no better driver
for the built-in switch or UNIPHY.

So, lets add the fixed-up version that supports kernel 5.15 for use on
ipq807x target until a better driver is available.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/kernel/qca-ssdk/patches/0010-QSDK-config-Avoid-Werror-heroics.patch

@@ -0,0 +1,30 @@
+From ecd1e0c57fdf7f8916fa20f085e08bb4b6ba0396 Mon Sep 17 00:00:00 2001
+From: Alexandru Gagniuc <mr.nuke.me@gmail.com>
+Date: Fri, 23 Sep 2022 08:21:13 -0500
+Subject: [PATCH 10/11] QSDK: config: Avoid -Werror heroics
+
+Trying to compile the QSDK with warnings as errors is a very brave
+endeavor. It's also stupid as it doesn't work on ipq60xx:
+
+   isisc_acl_prv.h:99: error: "FIELD_GET" redefined [-Werror]
+   99 | #define FIELD_GET(reg, field, val) \
+      |
+
+Instead of dealing with the braindead code, just disable Werror.
+
+Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
+---
+ config | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/config
++++ b/config
+@@ -141,7 +141,7 @@ endif
+ 
+ ifeq ($(ARCH), arm64)
+ 	ifeq ($(KVER),$(filter 4.1% 4.4% 4.9% 5.4% 5.10% 5.15%,$(KVER)))
+-		CPU_CFLAG=  -DMODULE -Os -pipe -march=armv8-a -mcpu=cortex-a53+crypto -fno-caller-saves -fno-strict-aliasing -Werror -fno-common -Wno-format-security -Wno-pointer-sign -Wno-unused-but-set-variable -Wno-error=unused-result -mcmodel=large
++		CPU_CFLAG=  -DMODULE -Os -pipe -march=armv8-a -mcpu=cortex-a53+crypto -fno-caller-saves -fno-strict-aliasing -fno-common -Wno-format-security -Wno-pointer-sign -Wno-unused-but-set-variable -Wno-error=unused-result -mcmodel=large
+ 	endif
+ endif
+