ARM: shmobile: r8a7791: fix MSTP8 input clocks

I made  a mistake when rebasing Andrey Gusakov's patch adding MLB+ clock to the
R8A7791 device  tree, inserting <&hp_clk> into the "clocks"  property of the
MSTP8 node at a wrong position, so that the input clocks for MLB+ and IPMMU-SGX
got swapped...

Fixes: 7408d306 ("ARM: shmobile: r8a7791: add MLB+ clock")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>