cm-t35: reduce the environment size

Reduce the environment size (128KB => 16KB) to improve the environment
operations time (e.g. reading, ecc calculation).
Also, remove the unused CONFIG_SYS_ENV_SECT_SIZE.
Signed-off-by: NIgor Grinberg <grinberg@compulab.co.il>

include/configs/cm_t35.h

@@ -77,7 +77,7 @@
 /*
  * Size of malloc() pool
  */
-#define CONFIG_ENV_SIZE		(128 << 10)	/* 128 KiB */
+#define CONFIG_ENV_SIZE		(16 << 10)	/* 16 KiB */
 					/* Sector */
 #define CONFIG_SYS_MALLOC_LEN	(CONFIG_ENV_SIZE + (128 << 10))
 
@@ -315,7 +315,6 @@
 #define ONENAND_ENV_OFFSET		0x260000 /* environment starts here */
 #define SMNAND_ENV_OFFSET		0x260000 /* environment starts here */
 
-#define CONFIG_SYS_ENV_SECT_SIZE	(128 << 10)	/* 128 KiB */
 #define CONFIG_ENV_OFFSET		SMNAND_ENV_OFFSET
 #define CONFIG_ENV_ADDR			SMNAND_ENV_OFFSET