Remove ALIGNBYTES and ALIGN from <sys/param.h>

There are only three users of bionic definition of ALIGN and keeping it
in sys/param.h polutes the namespace.

I inline the definition in the the three places that's used.

Bug: 13400663
Change-Id: I565008e8426c38ffb07422f42cd8e547d53044e9

libc/include/sys/param.h

@@ -34,16 +34,6 @@
 #define MAXPATHLEN  PATH_MAX
 #define MAXSYMLINKS 8
 
-#if __LP64__
-#define ALIGNBYTES 7
-#else
-#define ALIGNBYTES 3
-#endif
-
-#ifndef ALIGN
-#define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) &~ ALIGNBYTES)
-#endif
-
 /* Macros for counting and rounding. */
 #ifndef howmany
 #define howmany(x, y)   (((x)+((y)-1))/(y))