add hw_random driver

Marcelo, please do a

bk pull bk://kernel.bkbits.net/jgarzik/hwrandom-2.4

I have sent the patch in a separate email, privately to you, for review.

Others may download the patch from

ftp://ftp.kernel.org/pub/linux/kernel/people/jgarzik/patchkits/2.4/2.4.22-hwrandom1.patch.bz2

This will update the following files:

 Documentation/Configure.help  |   15 
 Documentation/hw_random.txt   |  138 +++++++++
 arch/i386/kernel/head.S       |    4 
 arch/i386/kernel/setup.c      |   78 +++--
 drivers/char/Config.in        |    4 
 drivers/char/Makefile         |    1 
 drivers/char/hw_random.c      |  631 ++++++++++++++++++++++++++++++++++++++++++
 include/asm-i386/cpufeature.h |   19 +
 include/asm-i386/msr.h        |    1 
 9 files changed, 864 insertions(+), 27 deletions(-)

through these ChangeSets:

<[email protected]> (03/08/25 1.1069)
[ia32] mention that X86_VENDOR_ID is tied to NCAPINTS, in a comment in arch/i386/kernel/head.S.

<[email protected]> (03/08/09 1.1068)
[ia32] adjust X86_VENDOR_ID offset in head.S, due to new NCAPINTS

<[email protected]> (03/08/07 1.1067)
[hw_random] add combined Intel+AMD+VIA h/w RNG driver

<[email protected]> (03/08/07 1.1066)
[ia32] Via, Intel cpu capabilities update

* /proc/cpuinfo support for Intel Prescott New Instructions (PNI)
* /proc/cpuinfo support for Centuar Extended Feature Flags (including "xstore", Via RNG support)
* at boot time, input x86 capability data for the two featuresets
* sync include/asm-i386/cpufeature.h definitions with 2.6.x