rp-pppoe: select pppd

There's no benefit on it being an autodep since it makes it harder to
find, and pppd can be selected directly.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rp-pppoe/Config.in

@@ -1,6 +1,12 @@
+comment "rp-pppoe needs a toolchain w/ dynamic library"
+	depends on BR2_STATIC_LIBS
+	depends on BR2_USE_MMU
+
 config BR2_PACKAGE_RP_PPPOE
 	bool "rp-pppoe"
-	depends on BR2_PACKAGE_PPPD
+	depends on !BR2_STATIC_LIBS
+	depends on BR2_USE_MMU # fork()
+	select BR2_PACKAGE_PPPD
 	help
 	  An implementation of the Point-to-point protocol over Ethernet.
 	  Has userspace client and server deamons. You likely only need