scripts/spelling.txt: add spelling fix for prohibited

Misspelling 'prohibited' is quite common in the real world, although
surprisingly not so much in the Linux Kernel.  In addition to fixing the
typo we may as well add it to the spelling checker.

Also adding the present participle (prohibiting).

Link: http://lkml.kernel.org/r/20190514153341.22540-1-chris.paterson2@renesas.com
Fixes: 5bf2fbbe ("clk: renesas: cpg-mssr: Add r8a77470 support")
Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/clk/renesas/r8a77470-cpg-mssr.c

@@ -175,7 +175,7 @@ static const unsigned int r8a77470_crit_mod_clks[] __initconst = {
  *---------------------------------------------------
  * 0  0		20		x80	x78	x50
  * 0  1		26		x60	x60	x56
- * 1  0		Prohibitted setting
+ * 1  0		Prohibited setting
  * 1  1		30		x52	x52	x50
  *
  * *1 :	Table 7.4 indicates VCO output (PLL0 = VCO)

scripts/spelling.txt

@@ -1009,6 +1009,8 @@ programers||programmers
 programm||program
 programms||programs
 progresss||progress
+prohibitted||prohibited
+prohibitting||prohibiting
 promiscous||promiscuous
 promps||prompts
 pronnounced||pronounced