Kernel does not like in *.scc's:

* capital Ms
* commeted out line with parameters
* sometime it does not like it in Kconfig:
  when 'tristate' is not followed by a comment as for CONFIG_MTD_NAND_OTP it should be:
  config CONFIG_MTD_NAND_OTP
    tristate "some description"
    default n

recipes-kernel/linux/config/elphel393.cfg

 CONFIG_ELPHEL393=y
-CONFIG_ELPHEL393_EXTERNAL=M
+CONFIG_ELPHEL393_EXTERNAL=m
 CONFIG_COMMON_CLK_SI570=y
 CONFIG_COMMON_CLK_SI5338=y
 CONFIG_LTC3589=y
@@ -23,7 +23,7 @@ CONFIG_CMA_SIZE_SEL_MBYTES=y
 CONFIG_CMA_ALIGNMENT=8
 #CONFIG_CMA_AREAS=7 #obsolete
 
-CONFIG_MTD_TESTS=y
+CONFIG_MTD_TESTS=m
 
 #
 # AHCI driver related configs
@@ -31,7 +31,7 @@ CONFIG_MTD_TESTS=y
 CONFIG_ATA=y
 CONFIG_ATA_VERBOSE_ERROR=y
 CONFIG_SATA_AHCI_PLATFORM=y
-CONFIG_AHCI_ELPHEL=M
+CONFIG_AHCI_ELPHEL=m
 
 CONFIG_DYNAMIC_DEBUG=y
 
@@ -42,6 +42,7 @@ CONFIG_UBIFS_FS=y
 CONFIG_UBIFS_FS_ADVANCED_COMPR=n
 #CONFIG_UBIFS_FS_LZO=y - default
 #CONFIG_UBIFS_FS_ZLIB=y - default
+
 CONFIG_MTD_NAND_OTP=y
 
 CONFIG_SENSORS_JC42=y
@@ -129,7 +130,7 @@ CONFIG_USB_SERIAL_PL2303=y
 # CONFIG_USB_SERIAL_SAFE is not set
 # CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
 # CONFIG_USB_SERIAL_SYMBOL is not set
-# CONFIG_USB_SERIAL_TI is not setf
+# CONFIG_USB_SERIAL_TI is not set
 # CONFIG_USB_SERIAL_CYBERJACK is not set
 # CONFIG_USB_SERIAL_XIRCOM is not set
 CONFIG_USB_SERIAL_WWAN=y
@@ -166,16 +167,11 @@ CONFIG_XILINX_AXI_EMAC=n
 # new ethernet driver (drivers/net/ethernet/cadence/macb.c) needs:
 #  CONFIG_ETHERNET
 #  CONFIG_NET_CADENCE
-#  CONFIG_MACB
-#  CONFIG_NETDEVICES
 #  CONFIG_HAS_DMA
 
 # it is off for zynq in rocko for some reason
 #CONFIG_I2C_XILINX=y
 
-# clock from MicroZed
-# CONFIG_COMMON_CLK_SI570=n
-
 # prints time before bootlog messages
 CONFIG_PRINTK_TIME=y