platform: qcom-geni-se: Correct macro definition of GENI_IO_MUX_1_EN

Correct macro definition of GENI_IO_MUX_1_EN to support SPI slave
full-duplex mode for MISO<->MOSI connection. Without this SPI
Slave full-duplex mode won't work.

In 'commit 005c3a05 ("spi: spi-geni-qcom: Allow MISO<->MOSI
connectivity for slave pins")'  GENI_IO_MUX_1_EN is configured
as 4 that should be 2 to configure SPI Slave MOSI line correctly
to support SPI Slave full-duplex mode.

Default SPI slave and master connection is MISO<->MISO and MOSI<->MOSI
line. This is a FIX for SPI Slave in which SPI slave MISO line is connected
to MOSI and vice versa.


Change-Id: I6d5bd2b3e7252ad272d88352a52dc005e4368af1
Signed-off-by: Ashish Kori <akori@codeaurora.org>