spi: bcm-qspi: fix SFDP BFPT read by usig mspi read

SFDP read shall use the mspi reads when using the bcm_qspi_exec_mem_op()
call. This fixes SFDP parameter page read failures seen with parts that
now use SFDP protocol to read the basic flash parameter table.

Fixes: 5f195ee ("spi: bcm-qspi: Implement the spi_mem interface")
Signed-off-by: Kamal Dasu <kamal.dasu@broadcom.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://msgid.link/r/20240109210033.43249-1-kamal.dasu@broadcom.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm-qspi.c

@@ -19,7 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/spi-mem.h>
+#include <linux/mtd/spi-nor.h>
 #include <linux/sysfs.h>
 #include <linux/types.h>
 #include "spi-bcm-qspi.h"
@@ -1221,7 +1221,7 @@ static int bcm_qspi_exec_mem_op(struct spi_mem *mem,
 
 	/* non-aligned and very short transfers are handled by MSPI */
 	if (!IS_ALIGNED((uintptr_t)addr, 4) || !IS_ALIGNED((uintptr_t)buf, 4) ||
-	    len < 4)
+	    len < 4 || op->cmd.opcode == SPINOR_OP_RDSFDP)
 		mspi_read = true;
 
 	if (!has_bspi(qspi) || mspi_read)