Level of MTT when mode is Smmtt46

[sqzsq]

This could be possibly a typo, but still:

Section 4.1 says:

"Figure 7 shows an RV64 supervisor physical address lookup; for lower physical address widths e.g. 34 or 46 bits, the MTTL3 table is not applicable as shown in Figure 8."

while Section 4.2 says:

"1. Let a be mttp.ppn x PAGESIZE, and let i = LEVELS, where for mode Smmtt34, LEVELS = 2 and for Smmtt[46 | 56], LEVELS = 3;"

[rsahita]

yup typo - should be LEVELS = 2 for Smmpt[34 | 46] and LEVELS = 3 for Smmpt56

[rsahita]

addressed in PR #107