[PATCH] IPMI: remove invalid acpi register spacing check

At the 2.6.12 timeframe ipmi_si_intf.c was patched to provide default
register spacings in try_init_acpi() if the register spacing was set to
zero, similar to code in other routines.

Unfortunately, another patch was simultaneously added that exits early from
try_init_acpi() if the register spacings are set to zero, circumventing the
new defaults.  This patch removes the early exit code and some incorrect
comments that aren't present in other common code snippets.

Signed-off-by: Rocky Craig <rocky.craig@hp.com>
Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>