Add kernel 5.15 for RPI4 support

root/target/linux/bcm27xx/patches-5.15/0593-clk-bcm2835-Remove-VEC-clock-support.patch

@@ -0,0 +1,39 @@
+From 6e9c5a2391959ab805ed07870c28adee79919328 Mon Sep 17 00:00:00 2001
+From: Dom Cobley <popcornmix@gmail.com>
+Date: Tue, 19 Oct 2021 14:14:55 +0100
+Subject: [PATCH 593/634] clk-bcm2835: Remove VEC clock support
+
+Signed-off-by: Dom Cobley <popcornmix@gmail.com>
+---
+ drivers/clk/bcm/clk-bcm2835.c | 15 ---------------
+ 1 file changed, 15 deletions(-)
+
+diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
+index e4dfbe2cf50e..7112a9c4f7e3 100644
+--- a/drivers/clk/bcm/clk-bcm2835.c
++++ b/drivers/clk/bcm/clk-bcm2835.c
+@@ -2208,21 +2208,6 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
+ 		.frac_bits = 12,
+ 		.tcnt_mux = 28),
+ 
+-	/* TV encoder clock.  Only operating frequency is 108Mhz.  */
+-	[BCM2835_CLOCK_VEC]	= REGISTER_PER_CLK(
+-		SOC_ALL,
+-		.name = "vec",
+-		.ctl_reg = CM_VECCTL,
+-		.div_reg = CM_VECDIV,
+-		.int_bits = 4,
+-		.frac_bits = 0,
+-		/*
+-		 * Allow rate change propagation only on PLLH_AUX which is
+-		 * assigned index 7 in the parent array.
+-		 */
+-		.set_rate_parent = BIT(7),
+-		.tcnt_mux = 29),
+-
+ 	/* dsi clocks */
+ 	[BCM2835_CLOCK_DSI0E]	= REGISTER_PER_CLK(
+ 		SOC_ALL,
+-- 
+2.33.1
+