enic: add dependency on Page Pool

Driver was not configured to select page_pool, causing a compile error
if page pool module was not already selected.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502211253.3XRosM9I-lkp@intel.com/
Fixes: d24cb52 ("enic: Use the Page Pool API for RX")
Reviewed-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
Reviewed-by: Joe Damato <jdamato@fastly.com>
Link: https://patch.msgid.link/20250224234350.23157-2-johndale@cisco.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/cisco/enic/Kconfig

@@ -6,5 +6,6 @@
 config ENIC
 	tristate "Cisco VIC Ethernet NIC Support"
 	depends on PCI
+	select PAGE_POOL
 	help
 	  This enables the support for the Cisco VIC Ethernet card.