fpga: fix sparse warnings in fpga-mgr and fpga-bridge

Fix up these sparse warnings:

drivers/fpga/fpga-mgr.c:189:21: warning: symbol '__fpga_mgr_get' was not declared. Should it be static?
drivers/fpga/fpga-bridge.c:30:12: warning: symbol 'bridge_list_lock' was not declared. Should it be static?
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>
Acked-by: NMoritz Fischer <mdf@kernel.org>
Signed-off-by: NAlan Tull <atull@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/fpga/fpga-bridge.c

@@ -27,7 +27,7 @@ static DEFINE_IDA(fpga_bridge_ida);
 static struct class *fpga_bridge_class;
 
 /* Lock for adding/removing bridges to linked lists*/
-spinlock_t bridge_list_lock;
+static spinlock_t bridge_list_lock;
 
 static int fpga_bridge_of_node_match(struct device *dev, const void *data)
 {

drivers/fpga/fpga-mgr.c

@@ -361,7 +361,7 @@ static struct attribute *fpga_mgr_attrs[] = {
 };
 ATTRIBUTE_GROUPS(fpga_mgr);
 
-struct fpga_manager *__fpga_mgr_get(struct device *dev)
+static struct fpga_manager *__fpga_mgr_get(struct device *dev)
 {
 	struct fpga_manager *mgr;
 	int ret = -ENODEV;