mkosi: Make sure we build custom kernels with EROFS support

Author: DaanDeMeyer

mkosi.kernel.config

@@ -51,6 +51,7 @@ CONFIG_EFI_MIXED=y
 CONFIG_EFI_STUB=y
 CONFIG_EFI_ZBOOT=y
 CONFIG_EFI=y
+CONFIG_EROFS_FS=y
 CONFIG_EXPERT=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y
@@ -98,6 +99,7 @@ CONFIG_IP6_NF_TARGET_REJECT=y
 CONFIG_ISO9660_FS=y
 CONFIG_KEXEC=y
 CONFIG_KPROBES=y
+CONFIG_KSM=y
 CONFIG_LOAD_UEFI_KEYS=y
 CONFIG_MAC80211=y
 CONFIG_MAGIC_SYSRQ=y
@@ -202,7 +204,6 @@ CONFIG_X86_MSR=y
 CONFIG_XFRM_USER=y
 CONFIG_XFS_FS=y
 CONFIG_XFS_POSIX_ACL=y
-CONFIG_KSM=y
 
 # CONFIG_WIRELESS is not set
 # CONFIG_WLAN is not set