PCI: xilinx-cpm: Add cpm_csr register mapping for CPM5_HOST1 variant

Update the CPM5 check to include CPM5_HOST1 variant. Previously, only
CPM5 was considered when mapping the "cpm_csr" register.

With this change, CPM5_HOST1 is also supported, ensuring proper
resource mapping for this variant.

Signed-off-by: Thippeswamy Havalige <thippeswamy.havalige@amd.com>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Link: https://lore.kernel.org/r/20250317124136.1317723-1-thippeswamy.havalige@amd.com