common/cnxk: fix build with custom maximum port config

common/cnxk: fix build with custom maximum port config

Build fails with custom max eth ports configuration, like
-Dmax_ethports=1024.

Build error is:
../drivers/common/cnxk/roc_nix_inl_dev.c:794:2:
  note: in expansion of macro ‘PLT_STATIC_ASSERT’
 |  PLT_STATIC_ASSERT(sizeof(struct nix_inl_dev) <= ROC_NIX_INL_MEM_SZ);
 |  ^~~~~~~~~~~~~~~~~

Earlier soft expiry ring struct member was an array of pointers and it's
size is linked to number of RTE_MAX_ETHPORTS, and the whole struct size
is confined and protected by size assertion.
It resulted in build failure with -Dmax_ethports=1024 option and
assertion caught that failure.

Use dynamically allocated memory for storing soft expiry ring base
addresses which fixes the struct size against custom RTE_MAX_ETHPORTS
values and solves the static assertion failure.

Bugzilla ID: 940
Fixes: bea5d990a93b ("net/cnxk: support outbound soft expiry notification")
Cc: stable@dpdk.org
Reported-by: Wei Ling <weix.ling@intel.com>
Reported-by: Yu Jiang <yux.jiang@intel.com>
Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com>
Signed-off-by: Srikanth Yalavarthi <syalavarthi@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>