Revert "caam: Fix CAAM error on startup"

This reverts commit 159b6f0e119962ce5da645f548cefe9196c8778e.

Since commit 159b6f0e1199 ("caam: Fix CAAM error on startup") the following
regression was reported by Tim Harvey:

"I've found that this patch causes a regression on an imx8mm board
(imx8mm_venice_defconfig) where the first call to caam_rng_read fails
here in jr_dequeue but if you call it again it works. With some
debugging added:
SEC0:  RNG instantiated
...
Hit any key to stop autoboot:  0
u-boot=> rng list
RNG #0 - caam-rng
u-boot=> rng 0 10
caam_rng_read caam-rng len=16
run_descriptor_jr_idx idx=0
Error in SEC deq: -1
caam_rng_read_one run_descriptor_jr failed: -1
caam_rng_read caam-rng caam_rng_read_one failed: -5
Reading RNG failed
u-boot=> rng 0 10
caam_rng_read caam-rng len=16
run_descriptor_jr_idx idx=0
00000000: ad 2e ad c0 2a 12 27 c4 65 82 66 19 be ef f6 07  ....*.'.e.f.....

If I revert your patch caam_rng_read works initially and on subsequent
calls."

" I ran into this when I was testing
lwIP HTTPS as it causes anything that uses dm_rng to fail the first
time (such as HTTPS)."

Revert it for now to avoid the regression.

Reported-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Peng Fan <peng.fan@nxp.com>

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