pciexp_device: Remove useless write on a read-only register

The Role-Based Error Reporting is not a configurable field,
it's a read only field in the Device Capability register.
This code was old and comes from commit f6eb88ad but evidently
is not useful in any way. The PCIe Specification [1] states
that it's read-only and must always be set to 1.

I have also done tests on purism/librem13 hardware, trying to
change that value, without any success.

[1]: PCI Express Base Specification Revision 3.0
     Page 612

Change-Id: I729617a5c6f4f52dfc4c422df78379b309066399
Signed-off-by: Youness Alaoui <youness.alaoui@puri.sm>
Reviewed-on: https://review.coreboot.org/19901
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions