nand: raw: Kconfig: Correct some dependency issues

The hidden symbol SPL_SYS_NAND_SELF_INIT was not being used correctly
leading to Kconfig dependency issues seen with "make allyesconfig". As
it's a select'd symbol we don't need to have a depends line on it, and
then in turn we need to also update the logic on SYS_NAND_PAGE_SIZE and
SYS_NAND_OOBSIZE.

Signed-off-by: Tom Rini <trini@konsulko.com>

drivers/mtd/nand/raw/Kconfig

@@ -11,7 +11,6 @@ config SYS_NAND_SELF_INIT
 
 config SPL_SYS_NAND_SELF_INIT
 	bool
-	depends on !SPL_NAND_SIMPLE
 	help
 	  This option, if enabled, provides more flexible and linux-like
 	  NAND initialization process, in SPL.
@@ -671,7 +670,6 @@ config SYS_NAND_PAGE_SIZE
 		MVEBU_SPL_BOOT_DEVICE_NAND || \
 		(NAND_ATMEL && SPL_NAND_SUPPORT) || \
 		SPL_GENERATE_ATMEL_PMECC_HEADER || NAND_SANDBOX || NAND_CADENCE
-	depends on !NAND_MXS && !NAND_DENALI_DT && !NAND_LPC32XX_MLC && !NAND_MT7621
 	help
 	  Number of data bytes in one page for the NAND chip on the
 	  board, not including the OOB area.
@@ -681,7 +679,6 @@ config SYS_NAND_OOBSIZE
 	depends on ARCH_SUNXI || NAND_OMAP_GPMC || \
 		SPL_NAND_SIMPLE || (NAND_MXC && SPL_NAND_SUPPORT) || \
 		(NAND_ATMEL && SPL_NAND_SUPPORT) || SPL_GENERATE_ATMEL_PMECC_HEADER
-	depends on !NAND_MXS && !NAND_DENALI_DT && !NAND_LPC32XX_MLC
 	help
 	  Number of bytes in the Out-Of-Band area for the NAND chip on
 	  the board.