redbear-power: fix clippy warnings in affinity.rs

Collapse nested if, replace map_or(false,...) with is_some_and,
use div_ceil instead of manual ceiling division.

local/recipes/system/redbear-power/source/src/affinity.rs

@@ -114,10 +114,10 @@ impl AffinityEditor {
     }
 
     pub fn should_auto_close(&self) -> bool {
-        if let Some(at) = self.result_at {
-            if self.result.as_ref().map_or(false, |r| r.is_ok()) {
-                return at.elapsed().as_secs() >= 2;
-            }
+        if let Some(at) = self.result_at
+            && self.result.as_ref().is_some_and(|r| r.is_ok())
+        {
+            return at.elapsed().as_secs() >= 2;
         }
         false
     }
@@ -127,7 +127,7 @@ impl Widget for &mut AffinityEditor {
     fn render(self, area: Rect, buf: &mut ratatui::buffer::Buffer) {
         Clear.render(area, buf);
         let cols = self.grid_cols();
-        let rows = (self.num_cpus + cols - 1) / cols;
+        let rows = self.num_cpus.div_ceil(cols);
         let dialog_h = (rows + 7).min(24) as u16;
         let dialog_w = ((cols * 6) + 4).min(80) as u16;
         let dx = area.x + (area.width.saturating_sub(dialog_w)) / 2;