[nrf fromtree] net: lib: capture: Fix build error

The CONFIG_ prefix was missed.

Signed-off-by: Chaitanya Tata <[email protected]>
(cherry picked from commit cef6b69)
(cherry picked from commit c8fd566)

Author: krish2718

subsys/net/lib/capture/capture.c

@@ -42,7 +42,8 @@ NET_PKT_SLAB_DEFINE(capture_pkts, CONFIG_NET_CAPTURE_PKT_COUNT);
 NET_BUF_POOL_FIXED_DEFINE(capture_bufs, CONFIG_NET_CAPTURE_BUF_COUNT,
 			  CONFIG_NET_BUF_DATA_SIZE, 4, NULL);
 #else
-#define DATA_POOL_SIZE MAX(NET_PKT_BUF_RX_DATA_POOL_SIZE, NET_PKT_BUF_TX_DATA_POOL_SIZE)
+#define DATA_POOL_SIZE MAX(CONFIG_NET_PKT_BUF_RX_DATA_POOL_SIZE, \
+			   CONFIG_NET_PKT_BUF_TX_DATA_POOL_SIZE)
 
 NET_BUF_POOL_VAR_DEFINE(capture_bufs, CONFIG_NET_CAPTURE_BUF_COUNT,
 			DATA_POOL_SIZE, 4, NULL);