Blackfin: bf537-stamp: drop board reset workaround

The bf537-stamp shouldn't need this SPI flash workaround.  It was added
by accident a long time ago through a convoluted series of steps which
originated from a customer board (not the bf537-stamp).  So drop it to
keep people from incorrectly adding it to their own boards.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

board/bf537-stamp/bf537-stamp.c

@@ -43,13 +43,6 @@ int checkboard(void)
 	return 0;
 }
 
-void board_reset(void)
-{
-	/* workaround for weak pull ups on ssel */
-	if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER)
-		bfin_reset_boot_spi_cs(GPIO_PF10);
-}
-
 #ifdef CONFIG_BFIN_MAC
 static void board_init_enetaddr(uchar *mac_addr)
 {