Made lwip memory configuration more specific for NXP targets
Made lwip memory configuration more specific for NXP targets

There is a configuration problem with UBLOX_C027 cellular because of missing
LWIP memory configuration for the target.

Added configuration for LPC1768, LPC4088, LPC4088_DM targets and changed
NXP to more specific LPC546XX.

c1728p9/mbed-os,kjbracey-arm/mbed,betzw/mbed-os,mbedmicro/mbed,andcor02/mbed-os,mbedmicro/mbed,c1728p9/mbed-os,andcor02/mbed-os,mbedmicro/mbed,kjbracey-arm/mbed,betzw/mbed-os,c1728p9/mbed-os,kjbracey-arm/mbed,c1728p9/mbed-os,andcor02/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,betzw/mbed-os,betzw/mbed-os,betzw/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os,betzw/mbed-os,andcor02/mbed-os