spi: microchip-core: Remove the unused function mchp_corespi_enable()

The function mchp_corespi_enable() is defined in the spi-microchip-core.c
file, but not called elsewhere, so delete this unused function.

drivers/spi/spi-microchip-core.c:122:20: warning: unused function 'mchp_corespi_enable'.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2418Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NJiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: NConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20221017092141.9789-1-jiapeng.chong@linux.alibaba.comSigned-off-by: NMark Brown <broonie@kernel.org>

drivers/spi/spi-microchip-core.c

@@ -119,15 +119,6 @@ static inline void mchp_corespi_write(struct mchp_corespi *spi, unsigned int reg
 	writel(val, spi->regs + reg);
 }
 
-static inline void mchp_corespi_enable(struct mchp_corespi *spi)
-{
-	u32 control = mchp_corespi_read(spi, REG_CONTROL);
-
-	control |= CONTROL_ENABLE;
-
-	mchp_corespi_write(spi, REG_CONTROL, control);
-}
-
 static inline void mchp_corespi_disable(struct mchp_corespi *spi)
 {
 	u32 control = mchp_corespi_read(spi, REG_CONTROL);