mtd: lpddr: Fix bad logic in print_drs_error

Update logic for broken test. Use a more common logging style.

It appears the logic in this function is broken for the
consecutive tests of

        if (prog_status & 0x3)
                ...
        else if (prog_status & 0x2)
                ...
        else (prog_status & 0x1)
                ...

Likely the first test should be

        if ((prog_status & 0x3) == 0x3)

Found by inspection of include files using printk.

Fixes: eb3db275 ("[MTD] LPDDR PFOW definition")
Cc: stable@vger.kernel.org
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/3fb0e29f5b601db8be2938a01d974b00c8788501.1588016644.git.gustavo@embeddedor.com

include/linux/mtd/pfow.h

@@ -128,7 +128,7 @@ static inline void print_drs_error(unsigned dsr)
 
 	if (!(dsr & DSR_AVAILABLE))
 		printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
-	if (prog_status & 0x03)
+	if ((prog_status & 0x03) == 0x03)
 		printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
 						"half with 41h command\n");
 	else if (prog_status & 0x02)