[MIPS] Alchemy common headers style cleanup

Fix several errors and warnings given by checkpatch.pl:

- space after opening and before closing parentheses;

- opening brace following 'struct' not on the same line;

- leading spaces instead of tabs;

- use of C99 // comments;

- macros with complex values not enclosed in parentheses;

- missing space between the type and asterisk in a variable declaration;

- space between asterisk and function name;

- including <asm/io.h> instead of <linux/io.h> and <asm/irq.h> instead of
  <linux/irq.h>;

- use of '__inline__' instead of 'inline';

- space between function name and opening parenthesis;

- line over 80 characters.

In addition to these changes, also do the following:

- remove needless parentheses;

- insert spaces between operator and its operands;

- replace spaces after the macro name with tabs in the #define directives and
  after the type in the structure field declarations;

- remove excess tabs after the macro name in the #define directives and in the
  'extern' variable declarations;

- remove excess spaces between # and define for the SSI_*_MASK macros to align
  with other such macros;

- put '||' operator on the same line with its first operand;

- properly indent multi-line function prototypes;

- make the multi-line comment style consistent with the kernel style elsewhere
  by adding empty first line and/or adding space/asterisk on their left side;

- make two-line comments that only have one line of text one-line;

- convert the large multi-line comment in au1xxx_ide.h into several one-liners,
  replace spaces with tabs there;

- fix typos/errors, capitalize acronyms, etc. in the comments;

- insert missing and remove excess new lines;

- update MontaVista copyright;

- remove Pete Popov's and Steve Longerbeam's old email addresses...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>