ARM: 5752/1: SA1100: fix building of h3100

Both iPaqs h3100 and h3600 currently share the same source
file - h3600.c  But Makefile builds it only if CONFIG_SA1100_H3600
selected, so selecting just CONFIG_SA1100_H3100 results in
"no machine record defined" message and aborted compilation.

Fix it.

Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Acked-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>