i7300_edac: Cleanup: remove get_error_info logic

As the error logic in this driver came from i5400 driver, it
were using one function to get errors, and another to display.
Let's make it simpler and avoid doing it into two steps.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --cc drivers/edac/i7300_edac.c
Simple merge