ACPI / IPMI: Cleanup some Kconfig codes

This (trivial) patch:
1. Deletes duplicate Kconfig dependency as there is "if IPMI_HANDLER"
   around "IPMI_SI".

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Reviewed-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/Kconfig

@@ -175,9 +175,10 @@ config ACPI_PROCESSOR
 
 	  To compile this driver as a module, choose M here:
 	  the module will be called processor.
+
 config ACPI_IPMI
 	tristate "IPMI"
-	depends on IPMI_SI && IPMI_HANDLER
+	depends on IPMI_SI
 	default n
 	help
 	  This driver enables the ACPI to access the BMC controller. And it