msm: ipa4: Fix to increase the modem SRAM size in IPA 4.2

In IPA 4.2 modem does not have enough space to install to filtering
and routing rules, so removing unused uC descriptor 1K SRAM memory and
using it for modem.

Change-Id: I7ceac47c69a9a61320a603655d7976920206b57c
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>