[PATCH] Fix ACPI compilation for 2.5.73

Without this patch ACPI won't compile on AMD64 because of mismatched prototypes.

Andrew stated that this is the way he wants it to be fixed.

drivers/acpi/osl.c

@@ -935,8 +935,8 @@ acpi_os_get_line(char *buffer)
 }
 
 /* Assumes no unreadable holes inbetween */
-BOOLEAN
-acpi_os_readable(void *ptr, u32 len)
+u8
+acpi_os_readable(void *ptr, acpi_size len)
 {
 #if defined(__i386__) || defined(__x86_64__) 
 	char tmp;
@@ -945,8 +945,8 @@ acpi_os_readable(void *ptr, u32 len)
 	return 1;
 }
 
-BOOLEAN
-acpi_os_writable(void *ptr, u32 len)
+u8
+acpi_os_writable(void *ptr, acpi_size len)
 {
 	/* could do dummy write (racy) or a kernel page table lookup.
 	   The later may be difficult at early boot when kmap doesn't work yet. */