linux-raspberrypi_6.12: bump SRCREV to rpi-6.12.y HEAD (6.12.93)

Captures raspberrypi/linux PR #7023 ("ARM: dts: Select the PL011
platform driver", merged 2025-09-25) which switches BCM2711 PL011 UART
nodes to the arm,pl011-axi compatible. Without it, the in-kernel
hci_uart_bcm driver fails to bring up the BCM43455 BT chip on the CM4
(hci0: command 0xfc18 tx timeout). Also brings ~14 months of stable
6.12.x point releases including CVE backports.

LINUX_VERSION  : 6.12.25 -> 6.12.93
SRCREV_machine : 3dd2c2c5... -> d8ab4e90... (rpi-6.12.y HEAD)
SRCREV_meta    : 1f6ab68a... -> e66f4099... (yocto-6.12 HEAD)

Signed-off-by: Enzo Frese <enzo.frese.g@gmail.com>

Author: FreseEnzo

recipes-kernel/linux/linux-raspberrypi_6.12.bb

@@ -1,9 +1,9 @@
-LINUX_VERSION ?= "6.12.25"
+LINUX_VERSION ?= "6.12.93"
 LINUX_RPI_BRANCH ?= "rpi-6.12.y"
 LINUX_RPI_KMETA_BRANCH ?= "yocto-6.12"
 
-SRCREV_machine = "3dd2c2c507c271d411fab2e82a2b3b7e0b6d3f16"
-SRCREV_meta = "1f6ab68a1d86836bf1b82b791df03da3cfeacb3f"
+SRCREV_machine = "d8ab4e908235da7727f22dd36ad5af224671677d"
+SRCREV_meta = "e66f40994fc740818776a0f3af55e8b6d74bfbef"
 
 KMETA = "kernel-meta"