net: ipa: Drop unused qmi_elem_info arrays

'ipa_mem_array_ei' is not used anywhere, so can be dropped completely.
'ipa_mem_bounds_ei' and 'ipa_mem_range_ei' are not used outside of their
units, so they can be narrowed to file-scope.

Reviewed-by: Alex Elder <elder@riscstar.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20261102123653.151700-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>