linux: bump to 6.6.74

CONFIG_FIRMWARE_RP1=y is needed to keep CONFIG_RP1_PIO=y.

Author: fhunleth

linux-6.6.defconfig

@@ -157,6 +157,7 @@ CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_BRCMSTB_GISB_ARB is not set
 CONFIG_CONNECTOR=m
 CONFIG_RASPBERRYPI_FIRMWARE=y
+CONFIG_FIRMWARE_RP1=y
 CONFIG_OF_CONFIGFS=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y

nerves_defconfig

@@ -28,8 +28,8 @@ BR2_ROOTFS_POST_BUILD_SCRIPT="${NERVES_DEFCONFIG_DIR}/post-build.sh ${BR2_EXTERN
 BR2_ROOTFS_POST_IMAGE_SCRIPT="${NERVES_DEFCONFIG_DIR}/post-createfs.sh"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/raspberrypi/linux/archive/80533a952218696c0ef1b346bab50dc401e6b74c.tar.gz"
-BR2_LINUX_KERNEL_PATCH="http://cdn.kernel.org/pub/linux/kernel/projects/rt/6.6/patch-6.6.65-rt47.patch.gz ${NERVES_DEFCONFIG_DIR}/linux"
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="https://github.com/raspberrypi/linux/archive/refs/tags/stable_20250127.tar.gz"
+BR2_LINUX_KERNEL_PATCH="http://cdn.kernel.org/pub/linux/kernel/projects/rt/6.6/patch-6.6.74-rt48.patch.gz ${NERVES_DEFCONFIG_DIR}/linux"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="${NERVES_DEFCONFIG_DIR}/linux-6.6.defconfig"
 BR2_LINUX_KERNEL_XZ=y
@@ -48,7 +48,7 @@ BR2_PACKAGE_MESA3D=y
 BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_V3D=y
 BR2_PACKAGE_MESA3D_OPENGL_ES=y
 BR2_PACKAGE_RPI_FIRMWARE=y
-BR2_PACKAGE_RPI_FIRMWARE_CUSTOM_VERSION="38d3dfafad92577c9e295fa3b7e5ec29adde94c5"
+BR2_PACKAGE_RPI_FIRMWARE_CUSTOM_VERSION="1.20250127"
 BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4_X=y
 # BR2_PACKAGE_RNG_TOOLS_JITTERENTROPY_LIBRARY is not set
 # BR2_PACKAGE_ALSA_LIB_RAWMIDI is not set