udoo_neo: Remove USDHC3 entry

Commit c94981ef ("udoo_neo: Remove USDHC3 support") removed
the SDHC3 support, but missed to remove the entry from the usdhc_cfg
structure, so just remove it.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

board/udoo/neo/neo.c

@@ -389,9 +389,8 @@ int board_early_init_f(void)
 	return 0;
 }
 
-static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+static struct fsl_esdhc_cfg usdhc_cfg[1] = {
 	{USDHC2_BASE_ADDR, 0, 4},
-	{USDHC3_BASE_ADDR, 0, 4},
 };
 
 #define USDHC2_PWR_GPIO IMX_GPIO_NR(6, 1)