qcacld-3.0: Fix fw statistics parsing on the host

For iHelium, the flag AR900B is defined in the firmware however
it is not defined on the host. This is causing a mismatch in the
statistics structure between the host and the firmware.
Temporarily enable this flag on the host. Eventually, this flag will
be replaced by a iHelium specific flag on both the host and the firmware

CRs-Fixed: 964909

Change-Id: I1a13db22448a099ea51602108eb5626e878e2c2e

Kbuild

@@ -1292,6 +1292,7 @@ CONFIG_FEATURE_TSO_DEBUG := y
 ifeq ($(CONFIG_HELIUMPLUS),y)
 CDEFINES += -DHELIUMPLUS_PADDR64
 CDEFINES += -DHELIUMPLUS
+CDEFINES += -DAR900B
 ifeq ($(CONFIG_64BIT_PADDR),y)
 CDEFINES += -DHTT_PADDR64
 endif