cnss2: Support dual wlan cards managed by cnss2 platform driver

Currently, the cnss2 platform driver just can support
one wlan device attached, so do the following changes
to cover dual wlan card attach case. Firstly, delay
the second device go to pcie link suspend and power
off state to make sure it really finished the pcie
enumeration. Then pcie enumeration succeeds with
multi-devices. Secondly, supporting to write the qrtr
node instance id to PCIE register for wlan fw reading,
which can fix qmi message exchange failure if active
two Hastings devices. Thirdly, change the usage of
plat_env to support dual Hastings.

Change-Id: Ica41a23d4e983b91c0ff1b4e76b380803fb877ab

cnss2/reg.h

@@ -124,6 +124,7 @@
 #define QCA6390_PCIE_SOC_PCIE_WRAP_INTR_STATUS_SOC_PCIE_REG 0x1E04058
 #define QCA6390_PCIE_SOC_COMMIT_REPLAY_SOC_PCIE_REG 0x01E05090
 #define PEACH_PCIE_SOC_COMMIT_REPLAY_SOC_PCIE_REG 0x01E01100
+#define QCA6390_PCIE_SOC_PCIE_REG_PCIE_SCRATCH_2_SOC_PCIE_REG 0x01E0405C
 #define QCA6390_PCIE_PCIE_PARF_LTSSM 0x01E081B0
 #define QCA6390_PCIE_PCIE_PARF_PM_STTS 0x01E08024
 #define QCA6390_PCIE_PCIE_PARF_PM_STTS_1 0x01E08028