fix(st-spi): remove SR_BUSY bit check before sending command

Waiting for SR_BUSY bit when receiving a new command is not needed.
SR_BUSY bit is already managed in the previous command treatment.

Change-Id: I736e8488d354cb165ae765022d864cca1dbdc9ee
Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com>
1 file changed