ide: remove hwif->autodma and drive->autodma

* hpt34x.c: disable DMA masks for HPT345
  (hwif->autodma is zero so DMA won't be enabled anyway).

* trm290.c: disable IDE_HFLAG_TRUST_BIOS_FOR_DMA flag
  (hwif->autodma is zero so DMA won't be enabled anyway).

* Check noautodma global variable instead of drive->autodma in ide_tune_dma().

  This fixes handling of "ide=nodma" kernel parameter for icside, ide-cris,
  au1xxx-ide, pmac, it821x, jmicron, sgiioc4 and siimage host drivers.

* Remove hwif->autodma (it was not checked by IDE core code anyway) and
  drive->autodma (was set by all host drivers - except HPT345/TRM290 special
  cases - unless "ide=nodma" was used).

While at it:
- remove needless printk() from icside.c
- remove stale FIXME/comment from ide-probe.c
- don't force DMA off if PCI bus-mastering had to be enabled in setup-pci.c
  (this setting was always later over-ridden by host drivers anyway)

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

include/linux/ide.h

@@ -576,7 +576,6 @@ typedef struct ide_drive_s {
 	select_t	select;		/* basic drive/head select reg value */
 
 	u8	keep_settings;		/* restore settings after drive reset */
-	u8	autodma;		/* device can safely use dma on host */
 	u8	using_dma;		/* disk is using dma for read/write */
 	u8	retry_pio;		/* retrying dma capable host in pio */
 	u8	state;			/* retry state */
@@ -797,7 +796,6 @@ typedef struct hwif_s {
 	unsigned	serialized : 1;	/* serialized all channel operation */
 	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
 	unsigned	reset      : 1;	/* reset after probe */
-	unsigned	autodma    : 1;	/* auto-attempt using DMA at boot */
 	unsigned	no_lba48   : 1; /* 1 = cannot do LBA48 */
 	unsigned	no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
 	unsigned	auto_poll  : 1; /* supports nop auto-poll */