Don't include <asm/ia64regs.h> unnecessarily.
Don't include <asm/ia64regs.h> unnecessarily.

We only need that header when compiling with icc, since the gcc variant of
ia64_get_bsp() uses in-line assembly code.  Per report from Frank Brendel,
the header doesn't exist on all IA64 platforms; so don't include it unless
we need it.

kmjungersen/PostgresXL,greenplum-db/gpdb,jmcatamney/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,zeroae/postgres-xl,lisakowen/gpdb,postmind-net/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,ovr/postgres-xl,pavanvd/postgres-xl,oberstet/postgres-xl,techdragon/Postgres-XL,ovr/postgres-xl,ashwinstar/gpdb,ovr/postgres-xl,adam8157/gpdb,50wu/gpdb,xinzweb/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,snaga/postgres-xl,pavanvd/postgres-xl,greenplum-db/gpdb,tpostgres-projects/tPostgres,kmjungersen/PostgresXL,lisakowen/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,postmind-net/postgres-xl,kmjungersen/PostgresXL,jmcatamney/gpdb,adam8157/gpdb,kmjungersen/PostgresXL,postmind-net/postgres-xl,adam8157/gpdb,pavanvd/postgres-xl,snaga/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb,oberstet/postgres-xl,yazun/postgres-xl,ovr/postgres-xl,postmind-net/postgres-xl,oberstet/postgres-xl,techdragon/Postgres-XL,arcivanov/postgres-xl,lisakowen/gpdb,xinzweb/gpdb,zeroae/postgres-xl,adam8157/gpdb,lisakowen/gpdb,lisakowen/gpdb,arcivanov/postgres-xl,jmcatamney/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,techdragon/Postgres-XL,50wu/gpdb,yazun/postgres-xl,oberstet/postgres-xl,50wu/gpdb,greenplum-db/gpdb,yazun/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,xinzweb/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,zeroae/postgres-xl,snaga/postgres-xl,snaga/postgres-xl,kmjungersen/PostgresXL,greenplum-db/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,adam8157/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,yazun/postgres-xl,50wu/gpdb,ashwinstar/gpdb,snaga/postgres-xl,jmcatamney/gpdb,yazun/postgres-xl,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,xinzweb/gpdb,xinzweb/gpdb,arcivanov/postgres-xl,arcivanov/postgres-xl,lisakowen/gpdb,postmind-net/postgres-xl,tpostgres-projects/tPostgres,adam8157/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,50wu/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,50wu/gpdb,techdragon/Postgres-XL,ashwinstar/gpdb,zeroae/postgres-xl,50wu/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL