Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 00ce31e..47ab280 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -25,11 +25,7 @@
 #include <asm/irq.h>
 #include <asm/parisc-device.h>
 
-#if defined(CONFIG_SERIAL_MUX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #include <linux/sysrq.h>
-#define SUPPORT_SYSRQ
-#endif
-
 #include <linux/serial_core.h>
 
 #define MUX_OFFSET 0x800
@@ -474,7 +470,7 @@
 		port->iobase	= 0;
 		port->mapbase	= dev->hpa.start + MUX_OFFSET +
 						(i * MUX_LINE_OFFSET);
-		port->membase	= ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
+		port->membase	= ioremap(port->mapbase, MUX_LINE_OFFSET);
 		port->iotype	= UPIO_MEM;
 		port->type	= PORT_MUX;
 		port->irq	= 0;
@@ -483,6 +479,7 @@
 		port->ops	= &mux_pops;
 		port->flags	= UPF_BOOT_AUTOCONF;
 		port->line	= port_cnt;
+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MUX_CONSOLE);
 
 		/* The port->timeout needs to match what is present in
 		 * uart_wait_until_sent in serial_core.c.  Otherwise