linux-aspeed: Move to v5.10.42 stable release

This includes security and bug fixes from the 5.10.40 through to
5.10.42 stable releases.

This stable release inclues a fix for the VUART on AST2600:

Andrew Jeffery (1):
      serial: 8250: Add UART_BUG_TXRACE workaround for Aspeed VUART

Change-Id: I8249b9564e2839e6ff9b19fbc247700d3f44699f
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb b/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
index a3a24b6..5bfc628 100644
--- a/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
+++ b/meta-aspeed/recipes-kernel/linux/linux-aspeed_git.bb
@@ -1,6 +1,6 @@
 KBRANCH ?= "dev-5.10"
-LINUX_VERSION ?= "5.10.39"
+LINUX_VERSION ?= "5.10.42"
 
-SRCREV="12165f912d1906426670cb9fde2244568a024c28"
+SRCREV="7590e064c6a69cbb12535a84414c6a04840ae82e"
 
 require linux-aspeed.inc