spi: spi_amd: Replace ioread/iowrite calls

All `ioread*` and `iowrite*` functions are better suited for architecture
independent code to ensure portability across different architectures.
Since AMD SoCs support only the x86 architecture, replacing all `ioread*`
and `iowrite*` calls with `read*` and `write*` calls can reduce the
overhead of ensuring portability and increase the speed of I/O operations.

Co-developed-by: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Co-developed-by: Akshata MukundShetty <akshata.mukundshetty@amd.com>
Signed-off-by: Akshata MukundShetty <akshata.mukundshetty@amd.com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Link: https://patch.msgid.link/20240925133644.2922359-4-Raju.Rangoju@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: RajuRangoju

drivers/spi/spi-amd.c

@@ -114,12 +114,12 @@ struct amd_spi {
 
 static inline u8 amd_spi_readreg8(struct amd_spi *amd_spi, int idx)
 {
-	return ioread8((u8 __iomem *)amd_spi->io_remap_addr + idx);
+	return readb((u8 __iomem *)amd_spi->io_remap_addr + idx);
 }
 
 static inline void amd_spi_writereg8(struct amd_spi *amd_spi, int idx, u8 val)
 {
-	iowrite8(val, ((u8 __iomem *)amd_spi->io_remap_addr + idx));
+	writeb(val, ((u8 __iomem *)amd_spi->io_remap_addr + idx));
 }
 
 static void amd_spi_setclear_reg8(struct amd_spi *amd_spi, int idx, u8 set, u8 clear)
@@ -132,12 +132,12 @@ static void amd_spi_setclear_reg8(struct amd_spi *amd_spi, int idx, u8 set, u8 c
 
 static inline u32 amd_spi_readreg32(struct amd_spi *amd_spi, int idx)
 {
-	return ioread32((u8 __iomem *)amd_spi->io_remap_addr + idx);
+	return readl((u8 __iomem *)amd_spi->io_remap_addr + idx);
 }
 
 static inline void amd_spi_writereg32(struct amd_spi *amd_spi, int idx, u32 val)
 {
-	iowrite32(val, ((u8 __iomem *)amd_spi->io_remap_addr + idx));
+	writel(val, ((u8 __iomem *)amd_spi->io_remap_addr + idx));
 }
 
 static inline void amd_spi_setclear_reg32(struct amd_spi *amd_spi, int idx, u32 set, u32 clear)