fdisk: (sgi) cleanup boot file name code

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) rdon't use read_chars() to ask yes/no question

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) small coding style changes

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: (sgi) rewrite sgi_list_table()

Signed-off-by: Karel Zak <kzak@redhat.com>