FROMLIST: firmware: arm_scmi: Fix up turbo frequencies selection

Sustained frequency when greater than or equal to 4Ghz on 64-bit devices
currently result in marking all frequencies as turbo. Address the turbo
frequency selection bug by fixing the truncation.

Bug: 418983052
Link: https://lore.kernel.org/lkml/20250514214719.203607-1-quic_sibis@quicinc.com/


Change-Id: I1bef1d83f64f00e9381ec15bd82ab138b8ff5ba3
Fixes: a897575e ("firmware: arm_scmi: Add support for marking certain frequencies as turbo")
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Shaleen Agrawal <quic_shalagra@quicinc.com>