board/lsi: Fix Build Issues when DISPLAY_PARAMETERS is Defined

Signed-off-by: John Jacques <john.jacques@lsi.com>
board/lsi: Remove Redundant Watchdog Enable

The watchdog gets enabled in lowlevel.S.  This change
removes redundant code in spl.c that enabled it again.

Signed-off-by: John Jacques <john.jacques@lsi.com>
board/lsi: Updated Axxia Version Handling

Previously, the version string was generated using git.  In
some cases, the boot loader gets built outside of source
control.  This commit removes all git dependence from the
makefiles.  To specify the version, add

    AXXIA_VERSION=<string>

For example, to get the current behavior,

    make AXXIA_VERSION="`git describe --dirty`"

Signed-off-by: John Jacques <john.jacques@lsi.com>
board/lsi: Fix a Bug in the ARM 811981 Work Around

CNTPCT was being read incorrectly in the work around.

Signed-off-by: John Jacques <john.jacques@lsi.com>