powerpc/ps3: Use str_write_read() in ps3stor_read_write_sectors()

Remove hard-coded strings by using the str_write_read() helper function
and silence the following Coccinelle/coccicheck warning reported by
string_choices.cocci:

opportunity for str_write_read(write)

Signed-off-by: Thorsten Blum <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Madhavan Srinivasan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/ps3/ps3stor_lib.c

···
 
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
+#include <linux/string_choices.h>
 
 #include <asm/lv1call.h>
 #include <asm/ps3stor.h>
···
 			       u64 start_sector, u64 sectors, int write)
 {
 	unsigned int region_id = dev->regions[dev->region_idx].id;
-	const char *op = write ? "write" : "read";
+	const char *op = str_write_read(write);
 	int res;
 
 	dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",