configs/imx6ulpico: update U-Boot and kernel

Update to U-Boot 2024.07 and kernel 6.6.48 versions.

The default U-Boot pico-imx6ul_defconfig causes the board to hang in SPL.

Fix it by chaging it to the more specific U-Boot
pico-pi-imx6ul_defconfig.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/imx6ulpico_defconfig

@@ -3,8 +3,8 @@ BR2_arm=y
 BR2_cortex_a7=y
 BR2_ARM_FPU_NEON_VFPV4=y
 
-# Linux headers same as kernel, a 5.15 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
+# Linux headers same as kernel, a 6.6 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_6=y
 
 # system
 BR2_TARGET_GENERIC_GETTY_PORT="ttymxc5"
@@ -15,10 +15,10 @@ BR2_ROOTFS_OVERLAY="board/technexion/imx6ulpico/rootfs_overlay"
 # kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15.11"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.48"
 BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6ul-pico-pi imx6ul-pico-hobbit imx6ul-pico-dwarf"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="nxp/imx/imx6ul-pico-pi nxp/imx/imx6ul-pico-hobbit nxp/imx/imx6ul-pico-dwarf"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_LINUX_KERNEL_INSTALL_TARGET=y
 
@@ -38,9 +38,9 @@ BR2_PACKAGE_WPA_SUPPLICANT_PASSPHRASE=y
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_SPL=y
 BR2_TARGET_UBOOT_SPL_NAME="SPL"
-BR2_TARGET_UBOOT_BOARDNAME="pico-imx6ul"
+BR2_TARGET_UBOOT_BOARDNAME="pico-pi-imx6ul"
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2021.10"
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2024.07"
 BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
 BR2_TARGET_UBOOT_FORMAT_DTB_IMG=y