ACPI: battery: fix ACPI battery technology reporting

At least some systems report technology information with trailing spaces:

{pts/1}% cat -E /var/tmp/bat/2.6.23 | grep type
battery type:            Li-ION  $

Use strncasecmp to compare model string to skip trailing part
Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/battery.c

@@ -125,7 +125,7 @@ static int acpi_battery_technology(struct acpi_battery *battery)
 		return POWER_SUPPLY_TECHNOLOGY_NiMH;
 	if (!strcasecmp("LION", battery->type))
 		return POWER_SUPPLY_TECHNOLOGY_LION;
-	if (!strcasecmp("LI-ION", battery->type))
+	if (!strncasecmp("LI-ION", battery->type, 6))
 		return POWER_SUPPLY_TECHNOLOGY_LION;
 	if (!strcasecmp("LiP", battery->type))
 		return POWER_SUPPLY_TECHNOLOGY_LIPO;