quagga: fix typo s/BPG/BGP/

Fixes bug #9431.

Reported-by: xichaoli <xichao@sina.cn>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/quagga/Config.in

@@ -25,9 +25,9 @@ config BR2_PACKAGE_QUAGGA_TCP_ZEBRA
 	  on different hosts.
 
 config BR2_PACKAGE_QUAGGA_BGPD
-	bool "BPGv4+ protocol"
+	bool "BGPv4+ protocol"
 	help
-	  Build bpgd daemon.
+	  Build bgpd daemon.
 
 config BR2_PACKAGE_QUAGGA_BGP_ANNOUNCE
 	bool "BGP route announcement"