net: ipa: add config dependency on QCOM_SMEM

The IPA driver depends on some SMEM functionality (qcom_smem_init(),
qcom_smem_alloc(), and qcom_smem_virt_to_phys()), but this is not
reflected in the configuration dependencies. Add a dependency on
QCOM_SMEM to avoid attempts to build the IPA driver without SMEM.
This avoids a link error for certain configurations.

Reported-by: Randy Dunlap <[e-mail]>
Fixes: 38a4066f593c5 ("net: ipa: support COMPILE_TEST")
Signed-off-by: Alex Elder <[e-mail]>
Acked-by: Randy Dunlap <[e-mail]> # build-tested
Reviewed-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ipa/Kconfig

···
 config QCOM_IPA
 	tristate "Qualcomm IPA support"
-	depends on 64BIT && NET
+	depends on 64BIT && NET && QCOM_SMEM
 	depends on ARCH_QCOM || COMPILE_TEST
 	depends on QCOM_RPROC_COMMON || (QCOM_RPROC_COMMON=n && COMPILE_TEST)
 	select QCOM_MDT_LOADER if ARCH_QCOM