powerpc/hvcall: Reorder Nestedv2 hcall opcodes

powerpc/hvcall: Reorder Nestedv2 hcall opcodes

Reorder the newly introduced hcall opcodes for Nestedv2 to follow the
increasing-opcode-number convention followed in 'hvcall.h'.

Also updates the value for MAX_HCALL_OPCODE which is used in various
places in arch code for range checking. Notably in the KVM enabled-hcall
logic, and in hcall tracing.

Fixes: 19d31c5f1157 ("KVM: PPC: Add support for nestedv2 guests")
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231219092309.118151-1-vaibhav@linux.ibm.com