ACPI: thinkpad-acpi: cleanup Kconfig for thinkpad-acpi

Since ibm-acpi was renamed to thinkpad-acpi, rename and update its Kconfig
entries and Kconfig-related symbols accordingly.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index ebf4ff2..e325164 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -12,4 +12,4 @@
 obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o
 obj-$(CONFIG_SGI_IOC4)		+= ioc4.o
 obj-$(CONFIG_SONY_LAPTOP)	+= sony-laptop.o
-obj-$(CONFIG_ACPI_IBM)		+= thinkpad_acpi.o
+obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o