siemens: board: etamin: remove deprecated nand config

NAND was used in the early development phase of etamin. The board runs now
on MMC. This setting is no more used -> remove to simplify the board file.

Further clean-up of etamin should remove all NAND settings. Complete clean-
up of etamin board will take place in a separate patch serie.

Signed-off-by: Enrico Leto <enrico.leto@siemens.com>
diff --git a/board/siemens/common/board.c b/board/siemens/common/board.c
index e412858..e5a42d7 100644
--- a/board/siemens/common/board.c
+++ b/board/siemens/common/board.c
@@ -93,10 +93,6 @@
 
 	gpmc_init();
 
-#if CONFIG_IS_ENABLED(NAND_CS_INIT)
-	board_nand_cs_init();
-#endif
-
 	return 0;
 }
 #endif /* #ifndef CONFIG_SPL_BUILD */
diff --git a/board/siemens/draco/Kconfig b/board/siemens/draco/Kconfig
index 0cdf5bc..9d45c42 100644
--- a/board/siemens/draco/Kconfig
+++ b/board/siemens/draco/Kconfig
@@ -44,6 +44,4 @@
 config SYS_CONFIG_NAME
         default "draco-etamin"
 
-config NAND_CS_INIT
-	def_bool y
 endif
diff --git a/board/siemens/draco/board.c b/board/siemens/draco/board.c
index 30ad9d7..d108d3e 100644
--- a/board/siemens/draco/board.c
+++ b/board/siemens/draco/board.c
@@ -358,30 +358,4 @@
 #endif /* #if defined(CONFIG_DRIVER_TI_CPSW) */
 #endif /* #if (defined(CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)) */
 
-#if CONFIG_IS_ENABLED(NAND_CS_INIT)
-#define ETAMIN_NAND_GPMC_CONFIG1	0x00000800
-#define ETAMIN_NAND_GPMC_CONFIG2	0x001e1e00
-#define ETAMIN_NAND_GPMC_CONFIG3	0x001e1e00
-#define ETAMIN_NAND_GPMC_CONFIG4	0x16051807
-#define ETAMIN_NAND_GPMC_CONFIG5	0x00151e1e
-#define ETAMIN_NAND_GPMC_CONFIG6	0x16000f80
-
-/* GPMC definitions for second nand cs1 */
-static const u32 gpmc_nand_config[] = {
-	ETAMIN_NAND_GPMC_CONFIG1,
-	ETAMIN_NAND_GPMC_CONFIG2,
-	ETAMIN_NAND_GPMC_CONFIG3,
-	ETAMIN_NAND_GPMC_CONFIG4,
-	ETAMIN_NAND_GPMC_CONFIG5,
-	ETAMIN_NAND_GPMC_CONFIG6,
-	/*CONFIG7- computed as params */
-};
-
-static void board_nand_cs_init(void)
-{
-	enable_gpmc_cs_config(gpmc_nand_config, &gpmc_cfg->cs[1],
-			      0x18000000, GPMC_SIZE_16M);
-}
-#endif
-
 #include "../common/board.c"