wimax/i2400m: verify firmware format version is known

Make sure the bootloading code checks that the format of the file is
understood (major version match). This also fixes a dumb typo in
extracting the major version field.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

drivers/net/wimax/i2400m/fw.c

@@ -1179,7 +1179,7 @@ int i2400m_fw_check(struct i2400m *i2400m,
 
 	module_type = bcf->module_type;
 	header_len = sizeof(u32) * le32_to_cpu(bcf->header_len);
-	major_version = le32_to_cpu(bcf->header_version) & 0xffff0000 >> 16;
+	major_version = (le32_to_cpu(bcf->header_version) & 0xffff0000) >> 16;
 	minor_version = le32_to_cpu(bcf->header_version) & 0x0000ffff;
 	module_id = le32_to_cpu(bcf->module_id);
 	module_vendor = le32_to_cpu(bcf->module_vendor);
@@ -1205,6 +1205,12 @@ int i2400m_fw_check(struct i2400m *i2400m,
 		goto error;
 	}
 
+	if (major_version != 1) {
+		dev_err(dev, "%s: major header version v%u.%u not supported\n",
+			i2400m->fw_name, major_version, minor_version);
+		goto error;
+	}
+
 	/* Check soft-er errors */
 	result = 0;
 	if (module_vendor != 0x8086)