bus: bt1-apb: Use sysfs_streq instead of strncmp

There is a ready-to-use method to compare a retrieved from a sysfs node
string with another string. It treats both NUL and newline-then-NUL as
equivalent string terminations. So use it instead of manually truncating
the line length in the strncmp() method.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Serge Semin <[email protected]>
Cc: Alexey Malahov <[email protected]>
Cc: Olof Johansson <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: [email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

Author: fancer

drivers/bus/bt1-apb.c

@@ -325,9 +325,9 @@ static ssize_t inject_error_store(struct device *dev,
 	 * Either dummy read from the unmapped address in the APB IO area
 	 * or manually set the IRQ status.
 	 */
-	if (!strncmp(data, "nodev", 5))
+	if (sysfs_streq(data, "nodev"))
 		readl(apb->res);
-	else if (!strncmp(data, "irq", 3))
+	else if (sysfs_streq(data, "irq"))
 		regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING,
 				   APB_EHB_ISR_PENDING);
 	else