net: dsa: MxL862xx: don't force-enable MAXLINEAR_GPHY

The newly added dsa driver attempts to enable the corresponding PHY driver,
but that one has additional dependencies that may not be available:

WARNING: unmet direct dependencies detected for MAXLINEAR_GPHY
  Depends on [m]: NETDEVICES [=y] && PHYLIB [=y] && (HWMON [=m] || HWMON [=m]=n [=n])
  Selected by [y]:
  - NET_DSA_MXL862 [=y] && NETDEVICES [=y] && NET_DSA [=y]
aarch64-linux-ld: drivers/net/phy/mxl-gpy.o: in function `gpy_probe':
mxl-gpy.c:(.text.gpy_probe+0x13c): undefined reference to `devm_hwmon_device_register_with_info'
aarch64-linux-ld: drivers/net/phy/mxl-gpy.o: in function `gpy_hwmon_read':
mxl-gpy.c:(.text.gpy_hwmon_read+0x48): undefined reference to `polynomial_calc'

There is actually no compile-time dependency, as DSA correctly uses the
PHY abstractions. Remove the 'select' statement to reduce the complexity.

Fixes: 23794be ("net: dsa: add basic initial driver for MxL862xx switches")
Signed-off-by: Arnd Bergmann <[email protected]>
Reviewed-by: Daniel Golle <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: arndb

drivers/net/dsa/mxl862xx/Kconfig

@@ -2,7 +2,6 @@
 config NET_DSA_MXL862
 	tristate "MaxLinear MxL862xx"
 	depends on NET_DSA
-	select MAXLINEAR_GPHY
 	select NET_DSA_TAG_MXL_862XX
 	help
 	  This enables support for the MaxLinear MxL862xx switch family.