IIO: Add 4-byte unsigned reads into generic-buffer example

Add unsigned 32bit-wide reads into the generic-buffer.c

Signed-off-by: Marek Vasut <[e-mail]>
Cc: Jonathan Cameron <[e-mail]>
Cc: Juergen Beisert <[e-mail]>
Cc: Lars-Peter Clausen <[e-mail]>
Cc: Wolfgang Denk <[e-mail]>
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/staging/iio/Documentation/generic_buffer.c

···
 			print2byte(*(uint16_t *)(data + channels[k].location),
 				   &channels[k]);
 			break;
+		case 4:
+			if (!channels[k].is_signed) {
+				uint32_t val = *(uint32_t *)
+					(data + channels[k].location);
+				printf("%05f ", ((float)val +
+						 channels[k].offset)*
+				       channels[k].scale);
+
+			}
+			break;
 		case 8:
 			if (channels[k].is_signed) {
 				int64_t val = *(int64_t *)