eeprom: Pull out CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS

Pull this macro to the beginning of the cmd_eeprom.c and remove
another nasty ifdef from the code. Note that this is legal, since
udelay(0) changes the behavior only such that it pings the WDT if
WDT is enabled and otherwise does not wait.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>

common/cmd_eeprom.c

@@ -29,6 +29,10 @@
 #define	CONFIG_SYS_I2C_SPEED	50000
 #endif
 
+#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS	0
+#endif
+
 /*
  * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is
  *   0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM.
@@ -211,9 +215,7 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn
 		buffer += len;
 		offset += len;
 
-#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS)
 		udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
-#endif
 	}
 
 	eeprom_write_enable(dev_addr, 0);