ACPICA: Rename ACPI bit register access functions

Rename acpi_get_register and acpi_set_register to clarify the
purpose of these functions. New names are acpi_read_bit_register
and acpi_write_bit_register.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/acpica/hwacpi.c

@@ -172,7 +172,7 @@ u32 acpi_hw_get_mode(void)
 		return_UINT32(ACPI_SYS_MODE_ACPI);
 	}
 
-	status = acpi_get_register(ACPI_BITREG_SCI_ENABLE, &value);
+	status = acpi_read_bit_register(ACPI_BITREG_SCI_ENABLE, &value);
 	if (ACPI_FAILURE(status)) {
 		return_UINT32(ACPI_SYS_MODE_LEGACY);
 	}