mpc85xx: add missing kernel symbols

These symbols were previously not set. Define their state to avoid
potentially breaking builds.

Signed-off-by: David Bauer <mail@david-bauer.net>

target/linux/mpc85xx/config-5.4

@@ -254,6 +254,8 @@ CONFIG_PPC_ADV_DEBUG_REGS=y
 CONFIG_PPC_BARRIER_NOSPEC=y
 CONFIG_PPC_BOOK3E_MMU=y
 # CONFIG_PPC_BOOK3S_32 is not set
+# CONFIG_PPC_BOOK3S_6xx is not set
+# CONFIG_PPC_BOOK3S_601 is not set
 CONFIG_PPC_DOORBELL=y
 # CONFIG_PPC_E500MC is not set
 # CONFIG_PPC_EARLY_DEBUG is not set
@@ -281,6 +283,7 @@ CONFIG_RTC_I2C_AND_SPI=y
 CONFIG_RTC_MC146818_LIB=y
 CONFIG_RWSEM_XCHGADD_ALGORITHM=y
 # CONFIG_SBC8548 is not set
+# CONFIG_SCOM_DEBUGFS is not set
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_FSL=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
@@ -321,6 +324,7 @@ CONFIG_VDSO32=y
 # CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_WATCHDOG_CORE=y
+# CONFIG_WS_AP3710I is not set
 # CONFIG_XES_MPC85xx is not set
 # CONFIG_XPS_USB_HCD_XILINX is not set
 CONFIG_XZ_DEC_BCJ=y

target/linux/mpc85xx/generic/config-default

@@ -15,3 +15,4 @@ CONFIG_UBIFS_FS=y
 CONFIG_UBIFS_FS_ADVANCED_COMPR=y
 CONFIG_UBIFS_FS_LZO=y
 CONFIG_UBIFS_FS_ZLIB=y
+CONFIG_UBIFS_FS_ZSTD=y

target/linux/mpc85xx/p1020/config-default

@@ -51,5 +51,6 @@ CONFIG_UBIFS_FS=y
 CONFIG_UBIFS_FS_ADVANCED_COMPR=y
 CONFIG_UBIFS_FS_LZO=y
 CONFIG_UBIFS_FS_ZLIB=y
+CONFIG_UBIFS_FS_ZSTD=y
 CONFIG_WS_AP3710I=y
 CONFIG_XPS=y