PPC assembly pack: add POWER9 results.

#		CBC en-/decrypt	CTR	XTS

# POWER8[le]	3.96/0.72	0.74	1.1

# POWER8[be]	3.75/0.65	0.66	1.0

# POWER9[le]	3.05/0.65	0.65	0.80

$flavour = shift;

# PPC970/G5		9.29/+160%	4.60

# POWER7		8.62/+61%	4.27

# POWER8		8.70/+51%	3.96

# POWER9		6.61/+29%	3.67

$flavour = shift;

# 2x aggregated reduction improves performance by 50% (resulting

# performance on POWER8 is 1 cycle per processed byte), and 4x

# aggregated reduction - by 170% or 2.7x (resulting in 0.55 cpb).

# POWER9 delivers 0.40 cpb.

$flavour=shift;

$output =shift;

# PPC970		7.00/+114%	3.51/+205%

# POWER7		3.75/+260%	1.93/+100%

# POWER8		-		2.03/+200%

# POWER9		-		1.56/+150%

#

# Do we need floating-point implementation for PPC? Results presented

# in poly1305_ieee754.c are tricky to compare to, because they are for

# PPC970		6.03/+80%

# POWER7		3.50/+30%

# POWER8		3.75/+10%

# POWER9		2.80/+12%

$flavour = shift;