cxl: Add CONFIG_CXL_EEH symbol
cxl: Add CONFIG_CXL_EEH symbol

CONFIG_CXL_EEH is for CXL's EEH related code.

Other drivers can depend on or #ifdef on this symbol to configure
PERST behaviour, allowing CXL to participate in the EEH process.

Reviewed-by: Cyril Bur <99dea9acac81454e66986aa60f5d078ee8370e4c@gmail.com>
Signed-off-by: Daniel Axtens <cf1af486034ab0119a20f38a060e40da25f4cea3@axtens.net>
Signed-off-by: Michael Ellerman <864f124608374e06e4da1fa5d2e47ed839b95411@ellerman.id.au>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs