support/testing: test_iso9660: Bump kernel version to last LTS (6.18)

Update the kernel configuration to support modern storage stacks
required for ISO booting on x86_64.

The transition from 4.19 to 6.18 requires explicit activation of:
- CONFIG_PCI: To discover the emulated IDE/SATA controllers.
- CONFIG_ATA & CONFIG_ATA_PIIX: Modern libATA drivers for QEMU's
  chipset (replacing the legacy IDE subsystem).
- CONFIG_SCSI & CONFIG_BLK_DEV_SR: Necessary to handle the CD-ROM
  as a SCSI device (/dev/sr0), which is mandatory for ISO9660.

Without these options, the kernel cannot locate or mount the
rootfs from the ISO image.

Signed-off-by: Dowan Gullient <dowan.gullient@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>

support/testing/conf/minimal-x86-qemu-kernel.config

@@ -12,9 +12,13 @@ CONFIG_INET=y
 CONFIG_VIRTIO_BLK=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_SR=y
+CONFIG_BLK_DEV_SR_VENDOR=y
+CONFIG_SCSI=y
 CONFIG_SCSI_VIRTIO=y
 CONFIG_ATA=y
 CONFIG_ATA_PIIX=y
+CONFIG_PATA_AMD=y
+CONFIG_PCI=y
 CONFIG_NETDEVICES=y
 CONFIG_VIRTIO_NET=y
 CONFIG_NE2K_PCI=y

support/testing/tests/fs/test_iso9660.py

@@ -11,7 +11,7 @@ BASIC_CONFIG = \
     BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200=y
     BR2_LINUX_KERNEL=y
     BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-    BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.204"
+    BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.21"
     BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
     BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="{}"
     # BR2_TARGET_ROOTFS_TAR is not set