spi: Remove SPI_OPM_RX_EXTN

SPI_OPM_RX_EXTN is a combination of all rx opmode's
and spi driver shall use any one of the rx mode at
a time not the combination and it is true in case of
flash where spi_flash_table mention combination of
supported read opmodes so-that the required one
will pick based on the rx mode from spi driver.

Cc: Simon Glass <sjg@chromium.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>

include/spi.h

@@ -41,9 +41,6 @@
 #define SPI_OPM_RX_DIO		(1 << 3)
 #define SPI_OPM_RX_QOF		(1 << 4)
 #define SPI_OPM_RX_QIOF		(1 << 5)
-#define SPI_OPM_RX_EXTN	(SPI_OPM_RX_AS | SPI_OPM_RX_AF | SPI_OPM_RX_DOUT | \
-				SPI_OPM_RX_DIO | SPI_OPM_RX_QOF | \
-				SPI_OPM_RX_QIOF)
 
 /* SPI bus connection options - see enum spi_dual_flash */
 #define SPI_CONN_DUAL_SHARED		(1 << 0)