asus_acpi: don't include modversions.h

Hi Linus,

Please consider applying, fixes this when doing a build with
allmodconfig:

CC [M] drivers/acpi/asus_acpi.o
drivers/acpi/asus_acpi.c:37:31: linux/modversions.h: Arquivo ou diretório nao encontrado make[2]: ** [drivers/acpi/asus_acpi.o] Erro 1
make[1]: ** [drivers/acpi] Erro 2
make: ** [drivers] Erro 2

- Arnaldo

===== drivers/acpi/asus_acpi.c 1.4 vs edited =====

@@ -33,9 +33,6 @@
  */
 
 #include <linux/config.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS) && defined (MODULE)
-#include <linux/modversions.h>
-#endif
 
 #include <linux/kernel.h>
 #include <linux/module.h>