am43xx: qspi: Fix config to select SPI mode

CONFIG_SF_DEFAULT_MODE is used to select default SPI mode when using
sf commands. Therefore fix am43xx to use CONFIG_SF_DEFAULT_MODE instead
of CONFIG_DEFAULT_SPI_MODE.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>

include/configs/am43xx_evm.h

@@ -227,7 +227,7 @@
 #define CONFIG_TI_SPI_MMAP
 #define CONFIG_QSPI_SEL_GPIO                   48
 #define CONFIG_SF_DEFAULT_SPEED                48000000
-#define CONFIG_DEFAULT_SPI_MODE                SPI_MODE_3
+#define CONFIG_SF_DEFAULT_MODE                 SPI_MODE_3
 #define CONFIG_QSPI_QUAD_SUPPORT
 #define CONFIG_TI_EDMA3