net: ethernet: stmmac: remove select QCOM_SOCINFO and make it optional

QCOM_SOCINFO depends on QCOM_SMEM but is not selected, this cause some
problems with QCOM_SOCINFO getting selected with the dependency of
QCOM_SMEM not met.
To fix this remove the select in Kconfig and add additional info in the
DWMAC_IPQ806X config description.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 9ec092d ("net: ethernet: stmmac: add missing sgmii configure for ipq806x")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/Kconfig

@@ -83,7 +83,6 @@ config DWMAC_IPQ806X
 	default ARCH_QCOM
 	depends on OF && (ARCH_QCOM || COMPILE_TEST)
 	select MFD_SYSCON
-	select QCOM_SOCINFO
 	help
 	  Support for QCA IPQ806X DWMAC Ethernet.
 
@@ -92,6 +91,9 @@ config DWMAC_IPQ806X
 	  acceleration features available on this SoC. Network devices
 	  will behave like standard non-accelerated ethernet interfaces.
 
+	  Select the QCOM_SOCINFO config flag to enable specific dwmac
+	  fixup based on the ipq806x SoC revision.
+
 config DWMAC_LPC18XX
 	tristate "NXP LPC18xx/43xx DWMAC support"
 	default ARCH_LPC18XX