ptp: ocp: Make debugfs variables the correct bitwidth

An earlier patch mistakenly changed these variables from u32 to u16,
leading to unintended truncation. Restore the original logic.

Fixes: a509a7c61e3b ("ptp: ocp: Add support for selectable SMA directions.")
Reported-by: Dan Carpenter <[e-mail]>
Signed-off-by: Jonathan Lemon <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/ptp/ptp_ocp.c

···
 {
 	struct device *dev = s->private;
 	struct ptp_system_timestamp sts;
-	u16 sma_val[4][2], ctrl, val;
 	struct ts_reg __iomem *ts_reg;
 	struct timespec64 ts;
 	struct ptp_ocp *bp;
+	u16 sma_val[4][2];
 	char *src, *buf;
+	u32 ctrl, val;
 	bool on, map;
 	int i;