swab: Add array operations

For now, some simple array operations to swab.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220831212744.56435-1-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/linux/swab.h

@@ -20,4 +20,29 @@
 # define swab64s __swab64s
 # define swahw32s __swahw32s
 # define swahb32s __swahb32s
+
+static inline void swab16_array(u16 *buf, unsigned int words)
+{
+	while (words--) {
+		swab16s(buf);
+		buf++;
+	}
+}
+
+static inline void swab32_array(u32 *buf, unsigned int words)
+{
+	while (words--) {
+		swab32s(buf);
+		buf++;
+	}
+}
+
+static inline void swab64_array(u64 *buf, unsigned int words)
+{
+	while (words--) {
+		swab64s(buf);
+		buf++;
+	}
+}
+
 #endif /* _LINUX_SWAB_H */