net: Make net_client_init() static

The function is only used within net.c, so there's no need that
this is a global function.

While we're at it, also remove the unused prototype compute_mcast_idx()
(the function has been removed in commit d9caeb09).
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>

include/net/net.h

@@ -204,7 +204,6 @@ extern const char *host_net_devices[];
 extern const char *legacy_tftp_prefix;
 extern const char *legacy_bootp_filename;
 
-int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp);
 int net_client_parse(QemuOptsList *opts_list, const char *str);
 int net_init_clients(Error **errp);
 void net_check_clients(void);
@@ -228,7 +227,6 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 #define POLYNOMIAL_LE 0xedb88320
 uint32_t net_crc32(const uint8_t *p, int len);
 uint32_t net_crc32_le(const uint8_t *p, int len);
-unsigned compute_mcast_idx(const uint8_t *ep);
 
 #define vmstate_offset_macaddr(_state, _field)                       \
     vmstate_offset_array(_state, _field.a, uint8_t,                \

net/net.c

@@ -1119,7 +1119,7 @@ static void show_netdevs(void)
     }
 }
 
-int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
+static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
 {
     void *object = NULL;
     Error *err = NULL;