amd64_edac: Fix bogus sysfs file permissions

Fix yet another issue caught by 8f46baaa7ec6c ("base: core: WARN() about
bogus permissions on device attributes").

Signed-off-by: Borislav Petkov <bp@suse.de>

drivers/edac/amd64_edac_inj.c

@@ -202,9 +202,9 @@ static DEVICE_ATTR(inject_word, S_IRUGO | S_IWUSR,
 		   amd64_inject_word_show, amd64_inject_word_store);
 static DEVICE_ATTR(inject_ecc_vector, S_IRUGO | S_IWUSR,
 		   amd64_inject_ecc_vector_show, amd64_inject_ecc_vector_store);
-static DEVICE_ATTR(inject_write, S_IRUGO | S_IWUSR,
+static DEVICE_ATTR(inject_write, S_IWUSR,
 		   NULL, amd64_inject_write_store);
-static DEVICE_ATTR(inject_read, S_IRUGO | S_IWUSR,
+static DEVICE_ATTR(inject_read,  S_IWUSR,
 		   NULL, amd64_inject_read_store);