linux-raspberrypi: Bump to 5.10.78

To include Pi Zero 2W device-tree changes
for brcmfmac firmware.

Signed-off-by: Alexandru Costache <alexandru@balena.io>

recipes-kernel/linux/linux-raspberrypi_5.10.bb

@@ -1,8 +1,8 @@
-LINUX_VERSION ?= "5.10.76"
+LINUX_VERSION ?= "5.10.78"
 LINUX_RPI_BRANCH ?= "rpi-5.10.y"
 LINUX_RPI_KMETA_BRANCH ?= "yocto-5.10"
 
-SRCREV_machine = "3728690b4a894dd57d3913f048dcab12bb61251e"
+SRCREV_machine = "b2c047ab7e17a4ed702d313581620e826c58cc3c"
 SRCREV_meta = "e1979ceb171bc91ef2cb71cfcde548a101dab687"
 
 KMETA = "kernel-meta"