msi.c is not a module on its own right and should not have the
MODULE_[LICENSE|VERSION|AUTHOR|DESCRIPTION] definitions.

This caused a regression noticed by lkp with the following back
trace:

   WARNING: CPU: 0 PID: 1 at kernel/params.c:861 param_sysfs_init+0xb1/0x20a
   Modules linked in:
   CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc1-00018-g26b3a37b #2
   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
   RIP: 0010:param_sysfs_init+0xb1/0x20a
   Code: 24 38 e8 ec 17 2e fd 49 8b 7c 24 38 e8 76 fe ff ff 48 85 c0 48 89 c5 74 25 31 d2 4c 89 e6 48 89 c7 e8 6d 6f 3c fd 85 c0 74 02 <0f> 0b 48 89 ef 31 f6 e8 5d 70 a7 fe 48 89 ef e8 95 52 a7 fe 48 83
   RSP: 0000:ffff88806b0ffe30 EFLAGS: 00010282
   RAX: 00000000ffffffef RBX: ffffffff83774220 RCX: ffff88806a85e880
   RDX: 00000000ffffffef RSI: ffff88806b000400 RDI: ffff88806a8608c0
   RBP: ffff88806b392000 R08: ffffed100d61ff59 R09: ffffed100d61ff59
   R10: 0000000000000001 R11: ffffed100d61ff58 R12: ffffffff83974bc0
   R13: 0000000000000004 R14: 0000000000000028 R15: 00000000000003b9
   FS:  0000000000000000(0000) GS:ffff88806b800000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: 0000000000000000 CR3: 000000000380e000 CR4: 00000000000406b0
   DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
   DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
   Call Trace:
    ? file_caps_disable+0x10/0x10
    ? locate_module_kobject+0xf2/0xf2
    do_one_initcall+0x47/0x1f0
    kernel_init_freeable+0x1b1/0x243
    ? rest_init+0xd0/0xd0
    kernel_init+0xa/0x130
    ? calculate_sigpending+0x63/0x80
    ? rest_init+0xd0/0xd0
    ret_from_fork+0x1f/0x30
   ---[ end trace 78201497ae74cc91 ]---
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 26b3a37b ("NTB: Introduce MSI library")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>